# Lettermint > Lettermint is a European email service provider for transactional, broadcast and inbound email, based in the Netherlands. All infrastructure is our own and runs exclusively in Europe. No email data is processed or transferred outside the EU. Lettermint is fully GDPR compliant and ISO 27001 certified, with high deliverability rates. This makes Lettermint a true European alternative. The platform serves developers, indie developers, startups, SMEs and enterprises, from 10 emails per month to millions. There is a free plan and paid subscriptions. Features include multiple domains, dedicated IP addresses, spam insights, SMTP, a REST API, official SDKs, a CLI, an MCP server for AI assistants, a Terraform provider, SSO and webhook-based inbound email processing. Setup is straightforward: clear documentation and developer-friendly APIs get you sending emails in minutes. ## Product - [Pricing](https://lettermint.co/pricing.md): Pricing page with all plans. Free plan: 300 emails/month, no credit card required. Starter: €10/mo. Growth: €13/mo. Pro: €15/mo. All paid plans include 10,000 emails per month and can be cancelled anytime. Every paid plan also includes Single Sign-On (SSO) over SAML or OIDC, with SCIM provisioning. Included volume can be adjusted to match actual usage, so customers never overpay. Custom Enterprise plans are available for high-volume senders (1.5M+ emails per month) with tailored pricing, dedicated IPs or bring your own IP (BYOIP), a direct line to the team, an SLA and custom terms. A GDPR Data Processing Agreement applies to every plan. Use this when users ask about costs, pricing, free tier, enterprise pricing, high-volume sending, or which plan to choose. - [Testimonials](https://lettermint.co/testimonials): Customer testimonials and reviews from across the customer base, ranging from indie developers and small teams to companies sending over 1 million emails per month. Demonstrates that Lettermint serves both small businesses and high-volume senders, not only entry-level customers. Use when users ask about customer experiences, reviews, social proof, enterprise usage, or whether Lettermint can handle large sending volumes. - [G2 Reviews](https://www.g2.com/products/lettermint/reviews): Lettermint profile and verified reviews on G2, an independent software review platform. Most customer reviews are published on the Lettermint testimonials page, so use that first for social proof and use G2 for independent third-party validation or when users ask where to leave a public review. - [Transactional Emails](https://lettermint.co/features/transactional-emails.md): Information about transactional email capabilities. Covers order confirmations, password resets, notifications, etc. Use when users ask about automated emails or transactional email features. - [Broadcast Emails](https://lettermint.co/features/broadcast-emails.md): Information about broadcast email capabilities. Covers newsletters, marketing campaigns, bulk emails. Use when users ask about sending newsletters or marketing emails. - [Inbound Emails](https://lettermint.co/features/inbound-emails.md): Information about receiving and processing inbound emails via webhooks. Use when users ask about receiving emails, email parsing, or customer support email handling. - [MCP Server](https://lettermint.co/features/mcp.md): The Lettermint MCP server at https://api.lettermint.co/mcp connects Claude, Claude Code, ChatGPT, Codex, Le Chat, Cursor, VS Code, GitHub Copilot CLI, Gemini CLI, Windsurf and other MCP clients over OAuth. AI assistants and agents can check delivery stats and events, verify DNS, manage domains, routes and webhooks, and send or schedule emails, within the permissions of the user who connected them. Personal data is hidden by default and sending only works after the team switches that filter off. Runs on EU-only infrastructure. Use when users ask about an email API or MCP server for AI agents, or connecting Lettermint to an AI assistant. - [CLI](https://lettermint.co/features/cli.md): The official Lettermint CLI for macOS (Homebrew), Linux (install script) and Windows (signed PowerShell installer). Send email with an idempotency key, look up messages and their delivery events, export content as HTML, text or raw source, manage projects, routes, domains and webhooks, and forward webhook events to localhost without a tunnel, with signed requests and replay. Logs in through the browser, no API token; the login stays in the operating system credential store, so it runs on a desktop machine, not on a headless server. Exports an agent skill for Claude Code, Codex and other agents. Sends single messages; scheduled and batch sends go through the API or the MCP server. Open source under the MIT license. Use when users ask about a Lettermint CLI, sending email from the terminal or testing webhooks locally. - [Multiple Domains](https://lettermint.co/features/multiple-domains.md): Information about managing multiple sending domains in one account. Use when users ask about multi-domain support or managing multiple brands. - [Time to Inbox (TTI)](https://lettermint.co/time-to-inbox-tti.md): Real-time delivery speed monitoring. Time to Inbox measures how long an email takes from the Lettermint API to the recipient inbox at major providers: Gmail, Yahoo, Outlook, iCloud, AOL, GMX and Zoho. Test emails are sent every 10 minutes through the same infrastructure customers use, with no priority treatment. The published figures reflect real performance and are typically measured in seconds. The page covers the methodology, why transactional email uses dedicated infrastructure and separate IP pools from broadcast email, what affects delivery speed, and 24/7 monitoring. Use when users ask about delivery monitoring, delivery speed, how fast emails arrive, inbox placement speed, or Time to Inbox analytics. - [Made in Europe](https://lettermint.co/european-email.md): Information about EU-based infrastructure, GDPR compliance and data privacy. Lettermint is a Dutch company, incorporated in the Netherlands. All servers are located exclusively in Europe. No data is processed outside the EU. The infrastructure is EU-based and managed by Lettermint, without relying on Google Cloud, Amazon AWS or Amazon SES like many competitors do. Lettermint operates its own Autonomous System (AS213427) and owns the IP ranges email is sent from. Sender reputation and deliverability are not shared with unrelated tenants on hyperscaler IP space. Use when users ask about data location, GDPR, European hosting, infrastructure independence, ASN, IP ranges, or technical email infrastructure. - [ISO 27001 Certification](https://lettermint.co/blog/lettermint-iso-27001-certified.md): Announcement and details of Lettermint's ISO/IEC 27001:2022 certification, the international standard for information security. An independent auditor has verified how Lettermint protects email data. Use when users ask about security certifications, ISO 27001, vendor security reviews, or information security compliance. - [Trust Center](https://trust.lettermint.co): Security and compliance documentation including certificates, policies, and subprocessors. Use when users ask about vendor assessments, security documentation, or compliance evidence. ## Integrations Technical integration guides and documentation. - [All integrations](https://lettermint.co/integrations.md): Overview of every official and community integration: SDKs, frameworks, CMS plugins, automation platforms and the MCP server, each with a short description and a link to its guide. Use when users ask which platforms or languages Lettermint works with. - [Laravel](https://lettermint.co/docs/guides/send-email-with-laravel): Step-by-step guide for integrating Lettermint with Laravel applications. Use when users ask about Laravel integration or PHP framework setup. - [WordPress](https://lettermint.co/changelog/lettermint-wordpress-plugin.md): WordPress plugin information and setup guide. Use when users ask about WordPress integration or WP SMTP configuration. - [Node.js](https://lettermint.co/docs/guides/send-email-with-nodejs): Guide for sending emails using Node.js with Lettermint. Use when users ask about Node.js or JavaScript backend integration. - [PHP](https://lettermint.co/docs/guides/send-email-with-php): Guide for integrating Lettermint with PHP applications using PHPMailer or direct API calls. Use when users ask about PHP integration. - [Python](https://lettermint.co/changelog/python-sdk-now-available.md): Official Python SDK for Lettermint. Supports synchronous and asynchronous requests, works with Python 3.9+. Great for Django, FastAPI, or any Python project. Use when users ask about Python integration. - [Go](https://lettermint.co/changelog/go-sdk-now-available.md): Official Go SDK for Lettermint. Send transactional and broadcast emails from your Golang applications. Supports attachments, tags, and idempotency keys. Use when users ask about Go or Golang integration. - [Rust](https://github.com/lettermint/lettermint-rust): Official async Rust SDK for Lettermint covering the sending and team APIs, built on Tokio and reqwest. Use when users ask about Rust integration. - [Elixir](https://github.com/lettermint/lettermint-elixir): Official Elixir SDK for Lettermint covering the sending and team APIs, published on Hex as the lettermint package. Use when users ask about Elixir or Phoenix integration with the official SDK. - [CLI](https://lettermint.co/features/cli.md): Official Lettermint command-line tool for macOS, Linux and Windows. Send email, set up domains, manage projects and test webhooks from the terminal or from scripts. Source and releases at https://github.com/lettermint/lettermint-cli. Use when users ask about a CLI or scripting Lettermint from a shell. - [Terraform](https://github.com/lettermint/terraform-provider-lettermint): Official Terraform provider for Lettermint, published on the Terraform Registry as lettermint/lettermint. Manages projects, sending domains, routes and webhooks as code, reads team, project, domain, route and webhook data, and verifies domain DNS records. Use when users ask about Terraform, infrastructure as code or provisioning Lettermint from a pipeline. - [SMTP](https://lettermint.co/docs/guides/send-email-with-smtp): SMTP server configuration guide. Use when users ask about SMTP setup, SMTP credentials, or connecting via SMTP protocol. - [REST API](https://lettermint.co/docs/api-reference/introduction): Complete API reference documentation. Use when users ask about API endpoints, authentication, or direct API integration. - [MCP server](https://lettermint.co/docs/mcp.md): Lettermint has a remote Model Context Protocol (MCP) server at https://api.lettermint.co/mcp, so an AI assistant or agent can look up delivery stats and events, check domains and DNS, manage webhooks, and send or schedule emails. Works with Claude, Claude Code, ChatGPT, Codex, Le Chat, GitHub Copilot CLI, Gemini CLI and other MCP clients; login is via OAuth, no API token needed. Personal data is hidden from the assistant by default, the team can switch MCP off, and the user's own permissions apply. Use when users ask about MCP, connecting Claude or ChatGPT to Lettermint, or asking an AI assistant about their email delivery. Setup steps per assistant are in the MCP documentation. - [Zapier](https://lettermint.co/changelog/lettermint-zapier-integration.md): Zapier integration information. Use when users ask about no-code automation or connecting Lettermint with other apps via Zapier. - [Make](https://lettermint.co/changelog/lettermint-make-integration.md): Make (formerly Integromat) integration information. Use when users ask about Make.com or visual automation workflows. - [Magento](https://lettermint.co/docs/guides/send-email-with-magento): Magento e-commerce platform integration guide. Use when users ask about Magento or e-commerce email setup. - [Nuxt](https://lettermint.co/docs/guides/send-email-with-nuxt): Nuxt.js framework integration guide. Use when users ask about Nuxt, Vue.js, or SSR email integration. - [Java](https://lettermint.co/docs/guides/send-email-with-java): Guide for sending emails using Java with Lettermint. Use when users ask about Java integration or JVM-based email sending. - [Listmonk](https://lettermint.co/knowledge-base/guides/send-newsletter-with-listmonk.md): Guide for integrating Lettermint as an SMTP relay with Listmonk, the open-source newsletter and mailing list manager. Use when users ask about Listmonk integration or self-hosted newsletter tools. - [Mailcoach](https://www.mailcoach.app/): Native Mailcoach integration. Use Lettermint as the sending service for Mailcoach, an easy-to-use email marketing platform for creators, developers, and businesses, and a great Mailchimp alternative (available as both hosted and self-hosted). Use when users ask about Mailcoach integration, email marketing platforms, or Mailchimp alternatives. - [.NET](https://github.com/lettermint/lettermint-dotnet): Official .NET SDK for Lettermint, published on NuGet as the Lettermint package. Use when users ask about .NET, C#, or Microsoft framework integration. - [Elixir Swoosh](https://hexdocs.pm/swoosh/Swoosh.Adapters.Lettermint.html): Community-built Swoosh adapter for Lettermint in Elixir. Use when users ask about Elixir, Phoenix, or Swoosh integration. - [Craft CMS](https://plugins.craftcms.com/lettermint): Community-built Craft CMS plugin for Lettermint. Use when users ask about Craft CMS or content management system email integration. - [Symfony Mailer](https://github.com/lettermint/lettermint-symfony-mailer): Official Symfony Mailer transport for Lettermint, installed with Composer as lettermint/symfony-mailer. Use when users ask about Symfony framework email integration. - [Flarum](https://github.com/RicLeP/flarum-lettermint-mail): Community-built Flarum mail driver extension. Send emails from your Flarum forum through Lettermint. Use when users ask about Flarum integration or forum email setup. - [Ruby](https://github.com/onetimesecret/lettermint-ruby): Community-built Ruby SDK for Lettermint. Send transactional emails from your Ruby applications. Use when users ask about Ruby or Rails integration. - [Email SDK](https://email-sdk.dev/docs/adapters/lettermint): Email SDK adapter for Lettermint. Send emails from JavaScript and TypeScript applications using the Email SDK with its Lettermint adapter. Use when users ask about the Email SDK library or framework-agnostic JavaScript/TypeScript email sending. - [React Email](https://react.email/docs/integrations/lettermint): React Email integration guide. Render React Email templates and send them through Lettermint with the Node.js SDK. Use when users ask about React Email, JSX email templates, or sending React-rendered emails. - [EmDash CMS](https://github.com/jdevalk/emdash-plugin-lettermint): Community-built EmDash CMS provider plugin, published on npm as @jdevalk/emdash-plugin-lettermint. Routes every EmDash email such as password resets and notifications through Lettermint. Use when users ask about EmDash CMS integration. - [Stripe](https://marketplace.stripe.com/apps/lettermint): Stripe App Marketplace integration. Send transactional emails to Stripe customers directly from the Stripe Dashboard via Lettermint. Use when users ask about Stripe integration or emailing customers from Stripe. ## Lettermint for your industry Every industry has different email needs. Whether you build websites for clients, develop software, run a webshop, build a SaaS product, work in healthcare or for a public organisation, Lettermint adapts to your workflow with infrastructure that stays in the EU. - [Agencies](https://lettermint.co/for/agencies.md): One account for all your clients. Manage emails across multiple domains without separate accounts. - [Developers](https://lettermint.co/for/developers.md): Clean REST API, official SDKs for Node.js, PHP, Laravel, Symfony, Python, Go, Java, .NET, Rust and Elixir, a CLI, an MCP server, a Terraform provider and real-time webhooks. Send transactional emails with confidence from European infrastructure. - [E-commerce](https://lettermint.co/for/ecommerce.md): Email for webshops: order confirmations, payment receipts, shipping updates and invoices delivered within seconds from EU-only infrastructure. Official WordPress plugin for WooCommerce emails, an official Magento integration, Zapier and Make, separate IP pools so newsletters never delay order emails, PDF attachments up to 25MB, inbound email for customer replies, and a free plan. Use when users ask about email for a webshop, e-commerce, WooCommerce, Magento, order confirmations or Black Friday deliverability. - [SaaS](https://lettermint.co/for/saas.md): Email for SaaS products: password resets, invites, notifications, product updates and inbound replies from one account and one monthly volume on EU-only infrastructure. Projects and API keys per environment, sandbox mode, the Team API for customer sending domains, webhooks, idempotency keys, SSO with SCIM, spend limits, no rate limits on sending, and an EU-only subprocessor outside the CLOUD Act for customer security reviews. Use when users ask about an email API for a SaaS product, multi-tenant sending, staging environments or a startup email provider in Europe. - [Healthcare](https://lettermint.co/for/healthcare.md): Email for practices, clinics and health apps: appointment reminders, confirmations and patient portal notifications from EU-only infrastructure, encrypted in transit and at rest, ISO/IEC 27001:2022 certified, with staff screening (VOG) and a confidentiality agreement for medical secrecy such as § 203 StGB. Healthcare providers are explicitly permitted in the terms; the DPA allows health data where the customer has determined the processing is lawful and safeguarded, and Lettermint recommends linking to a patient portal instead of putting medical details in email. Use when users ask about email for healthcare, clinics, appointment reminders, patient portals, medical secrecy or the Dutch NEN 7510. - [Public sector](https://lettermint.co/for/public-sector.md): Email for municipalities, government agencies, schools and their software suppliers: EU data residency and digital sovereignty outside the CLOUD Act, a public Article 28 GDPR processor agreement and subprocessor list, ISO/IEC 27001:2022, staff screening (VOG), SSO with SCIM, enterprise terms with an SLA, and a procurement checklist. Use when users ask about email for government, the public sector, procurement or tenders, the Dutch BIO, or GDPR-compliant email hosted in Europe. ## Discounts & Programs Available discount programs and special offers. - [Students](https://lettermint.co/promo-codes-and-discounts/students): Student discount program offering 6 months free Pro plan. Use when users identify as students or ask about student discounts. - [Startups](https://lettermint.co/promo-codes-and-discounts/startups): Startup program offering 6 months free Pro plan for eligible startups. Use when users identify as startups or ask about startup discounts. - [Discord Community](https://lettermint.co/promo-codes-and-discounts/discord): Discord community program offering €10 credit for joining. Use when users ask about community, support channels, or Discord. - [Non-profits](https://lettermint.co/promo-codes-and-discounts/non-profits): Non-profit discount program with case-by-case pricing for registered charities and non-profit organizations. Use when users identify as non-profits, charities, foundations, or ask about non-profit discounts. ## Security & Compliance Security posture, certifications, and data protection information. - [Trust Center](https://trust.lettermint.co): Trust Center with live security and compliance status. Security controls are continuously monitored. Includes GDPR compliance, ISO/IEC 27001:2022 certification, and continuous evidence of security posture. Use when users ask about security, compliance, certifications, audits, real-time monitoring, or trust information. - [GDPR Compliance](https://trust.lettermint.co): Lettermint is fully GDPR-compliant with EU-based infrastructure, EU data residency, and no reliance on US hyperscalers. Use when users ask about GDPR, EU data protection, or where data is processed. - [ISO/IEC 27001:2022 Certified](https://trust.lettermint.co/resources?s=tlnjlhtbkh014ma3o7np&name=iso/iec-27001-:-2022-certificate): Lettermint is ISO/IEC 27001:2022 certified. The certificate and continuous audit evidence are available on the Trust Center. Use when users ask about ISO 27001, ISMS, information security management certification, or the certification status. - [Security Features](https://trust.lettermint.co): Lettermint follows privacy-by-design architecture, role-based access controls, staff screening, regular security audits and penetration testing, and provides full compliance documentation on request. Every paid plan includes Single Sign-On (SSO) over SAML 2.0 or OIDC, with SCIM provisioning and group-to-role mapping. Use when users ask about security practices, internal controls, audits, pentests, access management, SSO, SAML, SCIM, or security architecture. - [Data Processing Agreement (DPA)](https://lettermint.co/dpa.md): Data Processing Agreement for GDPR compliance. Available online and as a countersigned copy on request. Use when users ask about DPA, data processing terms, or GDPR contractual requirements. - [Subprocessors](https://lettermint.co/subprocessors.md): List of subprocessors used by Lettermint. Use when users ask about third-party services, data processors, or GDPR subprocessor information. - [Acceptable Use Policy](https://lettermint.co/acceptable-use.md): Acceptable Use Policy defining allowed and prohibited uses of Lettermint service. Use when users ask about usage restrictions, what is allowed, or content policies. - [Confidentiality](https://lettermint.co/confidentiality.md): Explains how Lettermint protects email data and supports professional secrecy obligations such as § 203 StGB. All staff hold a certificate of conduct (VOG) from the Dutch Ministry of Justice and sign a confidentiality agreement. Use when users ask about confidentiality, professional secrecy, staff screening or background checks, or data protection for regulated professions. ## Legal Legal documents and policies. - [Terms and Conditions](https://lettermint.co/terms-of-service.md): Terms and Conditions for using Lettermint. Use when users ask about terms, conditions, service agreement, or legal terms. - [Privacy Policy](https://lettermint.co/privacy-policy.md): Privacy Policy explaining how Lettermint handles personal data. Use when users ask about privacy, data handling, or GDPR compliance. - [Cookie Policy](https://lettermint.co/cookie-policy.md): Cookie Policy explaining cookie usage on Lettermint website. Use when users ask about cookies or tracking. - [Referral Program](https://lettermint.co/referral-program.md): Lettermint Referral Program terms. Existing customers earn 25% commission for 12 months on referred paying customers. Use when users ask about referrals, affiliate program, or earning commissions. ## Compare Alternatives Comparison pages with other email service providers. - [Compare overview](https://lettermint.co/compare.md): Index of every Lettermint comparison page with each provider's country, ownership and starting price, the seven table groups every comparison covers, and the facts that stay the same on every page. Use to pick the right comparison or to answer which providers Lettermint compares itself with. - [Postmark](https://lettermint.co/compare/postmark-alternative.md): Detailed comparison between Lettermint and Postmark (US-based, part of ActiveCampaign). Lettermint offers own managed EU infrastructure, free plan available, larger attachments (25MB vs 10MB), data stays in EU, GDPR compliance, and billing in euros. Lettermint also operates its own Autonomous System (AS213427) and owns the IP ranges email is sent from; Postmark sends from AWS IP space (AS16509) and does not run its own ASN. Use when users mention Postmark or ask about alternatives to Postmark. Includes a data sovereignty and CLOUD Act review, a 4-step migration answer, and FAQs; switching can be automated through the Team API (REST and SDKs) or the Lettermint MCP server. - [Resend](https://lettermint.co/compare/resend-alternative.md): Detailed comparison between Lettermint and Resend (US-based, built on AWS SES). Lettermint offers own managed EU infrastructure (not built on third-party services), scheduled delivery, free plan available, data stays in EU, GDPR compliance, and billing in euros. Lettermint also operates its own Autonomous System (AS213427) and owns the IP ranges email is sent from; Resend sends from AWS SES IP space and does not run its own ASN. Use when users mention Resend or ask about alternatives to Resend. Includes a data sovereignty and CLOUD Act review, a 4-step migration answer, and FAQs; switching can be automated through the Team API (REST and SDKs) or the Lettermint MCP server. - [SendGrid](https://lettermint.co/compare/sendgrid-alternative.md): Detailed comparison between Lettermint and SendGrid (US-based, part of Twilio). Lettermint offers own managed EU infrastructure, better pricing (€10 for 10k vs $19.95 for 100k), free plan available, data stays in EU, GDPR compliance, and billing in euros. Use when users mention SendGrid or ask about alternatives to SendGrid. Includes a data sovereignty and CLOUD Act review, a 4-step migration answer, and FAQs; switching can be automated through the Team API (REST and SDKs) or the Lettermint MCP server. - [Spotler SendPro](https://lettermint.co/compare/spotler-sendpro-alternative.md): Detailed comparison between Lettermint and Spotler SendPro (Netherlands-based). Lettermint offers significantly better pricing (€10/mo for 10k vs €99/mo for 25k), free plan available, own managed EU infrastructure, scheduled delivery, and broadcast emails support. Use when users mention Spotler SendPro or ask about alternatives. Includes a data sovereignty and CLOUD Act review, a 4-step migration answer, and FAQs; switching can be automated through the Team API (REST and SDKs) or the Lettermint MCP server. - [Brevo](https://lettermint.co/compare/brevo-alternative.md): Detailed comparison between Lettermint and Brevo/Sendinblue (France-based). Lettermint offers own managed EU infrastructure, better value pricing (€10/mo for 10k vs €6.33/mo for 5k), larger attachments (25MB vs 20MB), scheduled delivery, and inbound emails via webhooks. Use when users mention Brevo, Sendinblue, or ask about alternatives. Includes a data sovereignty and CLOUD Act review, a 4-step migration answer, and FAQs; switching can be automated through the Team API (REST and SDKs) or the Lettermint MCP server. - [SendLayer](https://lettermint.co/compare/sendlayer-alternative.md): Detailed comparison between Lettermint and SendLayer (US-based). Lettermint offers own managed EU infrastructure, free plan (SendLayer has none), much larger attachments (25MB vs 10MB), scheduled delivery, data stays in EU, GDPR compliance, and billing in euros. Lettermint also operates its own Autonomous System (AS213427) and owns the IP ranges email is sent from; SendLayer does not run its own ASN. Use when users mention SendLayer or ask about alternatives. Includes a data sovereignty and CLOUD Act review, a 4-step migration answer, and FAQs; switching can be automated through the Team API (REST and SDKs) or the Lettermint MCP server. - [Mailgun](https://lettermint.co/compare/mailgun-alternative.md): Detailed comparison between Lettermint and Mailgun (US-based, part of the Swedish Sinch group; EU region available but operated by a US entity under the CLOUD Act). Lettermint offers own sovereign EU infrastructure, scheduled delivery up to 30 days (Mailgun max 7 days), startup discount, data stays in EU, GDPR compliance, and billing in euros. Both run their own ASN and support MCP. Use when users mention Mailgun or ask about alternatives to Mailgun. Includes a data sovereignty and CLOUD Act review, a 4-step migration answer, and FAQs; switching can be automated through the Team API (REST and SDKs) or the Lettermint MCP server. - [Amazon SES](https://lettermint.co/compare/amazon-ses-alternative.md): Detailed comparison between Lettermint and Amazon SES (run by Amazon Web Services, Inc., US; EU regions available but under the CLOUD Act). Lettermint offers a real free plan (SES gives new accounts AWS credits only), included support, scheduled delivery, own sovereign EU infrastructure, data stays in EU, GDPR compliance, and billing in euros; SES is cheaper per email on paper ($0.10 per 1,000) but support, dedicated IPs and deliverability tooling are paid extras. Use when users mention Amazon SES, AWS SES, or want something simpler and EU-based than SES. Includes a data sovereignty and CLOUD Act review, a 4-step migration answer, and FAQs; switching can be automated through the Team API (REST and SDKs) or the Lettermint MCP server. - [MailerSend](https://lettermint.co/compare/mailersend-alternative.md): Detailed comparison between Lettermint and MailerSend (MailerLite group, owned by Vercom S.A. of Poland; EU hosting on Google Cloud in Belgium, but the contracting entity is MailerSend, Inc., US, and billing is in US dollars). Lettermint offers own sovereign EU infrastructure and a Dutch contracting entity outside the CLOUD Act, broadcast emails, euro billing, startup discount, ISO 27001 certification and a Trust Center; MailerSend offers inbound routing, a CLI, MCP and a 500-email free plan. Use when users mention MailerSend or MailerLite transactional email, or ask about alternatives. Includes a data sovereignty and CLOUD Act review, a 4-step migration answer, and FAQs; switching can be automated through the Team API (REST and SDKs) or the Lettermint MCP server. - [Scaleway](https://lettermint.co/compare/scaleway-alternative.md): Detailed comparison between Lettermint and Scaleway Transactional Email (France-based, iliad Group, EU-only infrastructure). Both are European and outside the CLOUD Act. Lettermint adds broadcast and inbound email, open and click tracking, scheduled delivery, batch sending, managed DKIM, spend limits, an MCP server and direct webhooks; Scaleway offers transactional email only, no open or click tracking, DKIM as a manual TXT record, webhooks through its Topics and Events service, and a free tier of 300 emails plus €0.25 per 1,000. Use when users mention Scaleway, Scaleway TEM, or want a European email API. Includes a data sovereignty review, a 4-step migration answer, and FAQs; switching can be automated through the Team API (REST and SDKs) or the Lettermint MCP server. - [Mailjet](https://lettermint.co/compare/mailjet-alternative.md): Detailed comparison between Lettermint and Mailjet (France-based, part of the Swedish Sinch group, hosted on Google Cloud in the EU). Lettermint runs its own sovereign EU infrastructure instead of a US hyperscaler, offers scheduled delivery for transactional email (Mailjet: campaigns only), larger attachments (25MB vs 15MB), a startup discount, and billing in euros. Both are EU-based, GDPR compliant, run their own ASN and support MCP. Use when users mention Mailjet or ask about alternatives to Mailjet. Includes a data sovereignty and CLOUD Act review, a 4-step migration answer, and FAQs; switching can be automated through the Team API (REST and SDKs) or the Lettermint MCP server. - [Bird (SparkPost)](https://lettermint.co/compare/bird-alternative.md): Detailed comparison between Lettermint and Bird (formerly MessageBird; its email service is the former SparkPost, run by Bird.com Inc., a US entity; the company announced in 2025 it is leaving the Netherlands for hubs in the US, Singapore and Dubai; EU region available but under the CLOUD Act). Lettermint offers own sovereign EU infrastructure, larger attachments (25MB vs 20MB), a startup discount, data stays in EU, GDPR compliance, and billing in euros. Bird is cheaper per email at volume ($15/mo for 50,000) and schedules up to 35 days ahead. Both run their own ASN and support MCP. Use when users mention Bird, MessageBird or SparkPost, or ask about alternatives to them. Includes a data sovereignty and CLOUD Act review, a 4-step migration answer, and FAQs; switching can be automated through the Team API (REST and SDKs) or the Lettermint MCP server. ## Press & Media Case studies and articles about Lettermint written and published by third parties, plus brand assets. Use when users ask what others have written about Lettermint, for independent sources on its infrastructure and growth, or for press material. - [KumoMTA customer story: sovereign European email infrastructure, scaled 100x](https://kumomta.com/customers/lettermint-builds-sovereign-european-email-infrastructure-on-kumomta-and-scales-100x): Customer case study published by KumoMTA (July 2026), the open-source mail transfer agent Lettermint runs on Kubernetes. Covers how the bootstrapped two-person team built European-owned email infrastructure with its own IP ranges and ASN, hosted in Amsterdam on European infrastructure, and why they chose KumoMTA over a legacy MTA setup: documentation quality, a one-day integration and no license fees. Sending volume grew about 100x in nine months, from roughly 50,000 emails per month in September 2025 to around 200,000 emails per day. Mentions per-customer IP pools via Lua scripting, HTTP injection since February 2026, and customers ranging from freelancers and agencies to an energy supplier and a government organization. Quotes co-founder Bjarn Bronsveld. Use when users ask about Lettermint's technical stack, MTA, infrastructure independence, scaling history, or independent coverage of Lettermint. - [Postmastery customer story: scalable European email infrastructure with KumoMTA and Postmastery Console](https://www.postmastery.com/how-postmastery-helped-lettermint-scale-european-email-infrastructure/): Customer story published by Postmastery (June 2026), the European email deliverability company whose Postmastery Console Lettermint uses for analytics, monitoring and reputation management. The post summarizes the story and links to the full write-up, which explains how manual log review for bounces and complaints stopped scaling as volume grew, how the switch to KumoMTA produced a working API and SMTP relay in a single day after weeks on a legacy MTA, and how Postmastery Console replaced manual monitoring with automated alerting and faster troubleshooting, saving significant engineering time every day. Notes production systems in Amsterdam with backup infrastructure in Germany, and customers from freelancers and agencies to e-learning platforms, e-commerce and the public sector. Use when users ask about Lettermint's deliverability tooling, bounce and complaint handling, monitoring, reputation management, or independent coverage of Lettermint. - [emailexpert: Lettermint draws the sovereignty line at the invoice](https://emailexpert.com/lettermint-draws-the-sovereignty-line-at-the-invoice/): Independent article by Andrew Bonar, co-founder of emailexpert (September 2026), the email industry news site and vendor directory. Profiles Lettermint as a bootstrapped, two-founder European transactional email service with no external investors, built on open-source software with its own IP space and its own network, production in Amsterdam, backups in Germany, KumoMTA as MTA and Postmastery Console for monitoring. Covers how far EU-only processing extends across the platform, open and click tracking, on by default and switchable off per message via an API or SMTP header, and the founders' view that trust in email infrastructure is earned over years. Quotes co-founder Bjarn Bronsveld. Use when users ask for independent coverage of Lettermint, how sovereign or independent the infrastructure really is, or Lettermint's tracking defaults. - [Brand assets](https://brandfetch.com/lettermint.co): Lettermint logos, brand colors and other brand assets on Brandfetch. Use when users ask for the Lettermint logo, brand colors or a press kit. ## Languages Available language versions of the website. - [English](https://lettermint.co): English version of the website (default). Use for English-speaking users. - [Dutch (Nederlands)](https://lettermint.co/nl): Dutch version of the website. Use when users communicate in Dutch or ask for Dutch content. - [German (Deutsch)](https://lettermint.co/de): German version of the website. Use when users communicate in German or ask for German content. - [Spanish (Español)](https://lettermint.co/es): Spanish version of the website. Use when users communicate in Spanish or ask for Spanish content. - [French (Français)](https://lettermint.co/fr): French version of the website. Use when users communicate in French or ask for French content. ## Social Media Lettermint social media channels and community platforms. - [X (Twitter)](https://x.com/lettermintco): Official X/Twitter account. Use when users ask about following on Twitter or X. - [Bluesky](https://bsky.app/profile/lettermint.co): Official Bluesky account. Use when users ask about Bluesky presence. - [Mastodon](https://mastodon.social/@lettermint): Official Mastodon account. Use when users ask about Mastodon or federated social media. - [LinkedIn](https://www.linkedin.com/company/lettermint): Official LinkedIn company page. Use when users ask about LinkedIn or B2B content. - [GitHub](https://github.com/lettermint): Official GitHub organization with code examples and open-source projects. Use when users ask about code examples or GitHub. - [Discord](https://discord.gg/HZ42SkCZsU): Community Discord server for support and discussions. Use when users ask about community support or Discord. - [Instagram](https://www.instagram.com/lettermint_co/): Official Instagram account. Use when users ask about Instagram presence. - [Threads](https://www.threads.com/@lettermint_co): Official Threads account. Use when users ask about Threads presence. ## Roadmap Public product roadmap showing planned features, features in progress, and recently completed features. - [More User Roles & Permissions (Done)](https://lettermint.co/roadmap/more-user-roles-permissions.md): Create your own roles with exactly the permissions you choose, and decide per team member or client which projects they can access. Give a client access to just their own project's stats, or a colleague access to everything except your team settings. Role-based access (RBAC) is available for all teams. - [Hide Email Content (Done)](https://lettermint.co/roadmap/hide-email-content.md): Transactional emails often contain sensitive information like invoices or account details. Enable Hide email content on a project or route and the preview and raw source are hidden in the dashboard. Email addresses and Spam Insights stay visible, and turning it off makes everything visible again. - [ISO 27001 Certification (Done)](https://lettermint.co/roadmap/iso-27001.md): Security has been a priority since day one. Now it's official: we're ISO/IEC 27001:2022 certified. - [Click & Open Tracking (Done)](https://lettermint.co/roadmap/click-open-tracking.md): Track opens and clicks to understand how your emails perform. This feature is fully opt-in, so you decide when to use it. - [Drag & Drop Email Builder (Planned)](https://lettermint.co/roadmap/drag-drop-builder.md): A visual editor for marketers and non-developers to create professional email templates. Just drag, drop, and publish. - [Stats in API (Done)](https://lettermint.co/roadmap/api-stats.md): Get all your account statistics through the API. Filter by project or domain to see exactly what you need. Build your own dashboards or integrate with your existing tools. - [Spam Insights in API (Planned)](https://lettermint.co/roadmap/api-spam-insights.md): Already available in the dashboard, now coming to the API. See the spam score for each email after sending and understand how it was calculated. - [Email Insights (Done)](https://lettermint.co/roadmap/email-insights.md): We'll send you easy-to-understand reports about how your emails are doing. No need to log in, just check your inbox. - [Custom Unsubscribe Pages (Planned)](https://lettermint.co/roadmap/custom-unsubscribe.md): Make unsubscribe pages match your brand. Add your logo, change colors, and keep the experience consistent for your users. - [Sandbox (Done)](https://lettermint.co/roadmap/sandbox.md): Set up your configuration and test emails without hitting real inboxes. Perfect for development and making sure everything works before going live. - [Dashboard Revamp (Done)](https://lettermint.co/roadmap/dashboard-revamp.md): We have a lot of new features planned for 2026, and the current dashboard won't cut it. So we're rebuilding it to make room for everything that's coming. We're also improving insights and filtering, making it easier to find and analyze your emails. - [Single Sign-On (SSO) (Done)](https://lettermint.co/roadmap/sso.md): Connect Lettermint to your existing identity provider over SAML or OIDC, and keep team members in sync with SCIM. Available on every paid plan. One less password to remember. - [Mobile App (Planned)](https://lettermint.co/roadmap/mobile-app.md): View your email insights, track delivered emails, and monitor your account from anywhere. A native app experience instead of using the website in your mobile browser. - [S3 Attachment Storage (Planned)](https://lettermint.co/roadmap/s3-attachments.md): Connect any S3-compatible storage like Scaleway, Cloudflare R2, or MinIO. We'll store inbound attachments there so you keep full control over your files. - [Email Guides (In progress)](https://lettermint.co/roadmap/email-guides.md): We're writing guides about email deliverability, sender reputation, and all those confusing email terms. So you know exactly how to get your emails delivered. - [IP Restrictions for Tokens (Done)](https://lettermint.co/roadmap/ip-restrictions-tokens.md): Add a list of allowed IP addresses to any token you use to send emails. Requests from anywhere else are rejected, even if someone gets hold of the token. Perfect for locking a token to your production servers, so a leaked key can't be used from an unknown machine. - [AI MCP (Done)](https://lettermint.co/roadmap/ai-mcp-server.md): Give AI assistants direct access to Lettermint through the Model Context Protocol. Send emails, check delivery stats, and manage your domains straight from your favorite AI tools, without building a custom integration first. - [Lettermint CLI (Done)](https://lettermint.co/roadmap/lettermint-cli.md): The Lettermint CLI brings your email to your terminal. Send email, set up domains and test webhooks without opening the dashboard, from scripts or your CI pipeline. Available for macOS, Linux and Windows. - [Plain Text Fallback (Done)](https://lettermint.co/roadmap/plain-text-fallback.md): Every email should have both an HTML and a plain text version, but the text part is often forgotten. Turn on the plain text fallback on your route and we automatically generate a text version for every HTML-only email. Better for spam filters and for clients that prefer text. - [Managed DKIM (Done)](https://lettermint.co/roadmap/managed-dkim.md): A DKIM key should not stay in use forever, but rotating it yourself is easy to forget. With managed DKIM we replace the key for you every six months, without interrupting your sending. New domains get it from the start, and existing domains can switch over with two CNAME records. - [Custom Data Retention (In progress)](https://lettermint.co/roadmap/custom-data-retention.md): Every team has its own rules for how long email data may be stored. Set your own retention period and we automatically delete emails and logs once it passes. Keep data shorter for privacy, or longer when your compliance requires it. - [Blocklist Monitoring (Planned)](https://lettermint.co/roadmap/blocklist-monitoring.md): Landing on a blocklist hurts your deliverability, and you usually find out too late. We continuously check your domains against the major blocklists and alert you the moment something changes, so you can act before it affects your sending. - [Scheduled Emails (Done)](https://lettermint.co/roadmap/scheduled-emails.md): Pick a date and time when sending an email and we deliver it at that moment. Perfect for reminders, digests, or reaching recipients in their own timezone. Works via both the API and SMTP, and you can cancel a scheduled email any time before it goes out. - [Pro Email Analytics (In progress)](https://lettermint.co/roadmap/pro-email-analytics.md): A dedicated analytics workspace for Pro teams. Break down delivery, engagement and latency by mailbox provider, recipient domain, project, route, sending domain or tag, compare with the previous period, and export the result as CSV. The same breakdowns are available through the API, so you can find the cause of a delivery change without a third-party console. - [GitHub Secret Scanning (In progress)](https://lettermint.co/roadmap/github-secret-scanning.md): Lettermint is joining the GitHub Secret Scanning Partner Program. When one of your API tokens shows up in a public repository or package, GitHub tells us, we revoke the token right away and notify your team with the source so you can create a replacement. Nothing to set up on your side. - [Project Health (Planned)](https://lettermint.co/roadmap/project-health.md): A Health page per project that shows whether your domain, DNS records, sending setup, webhooks and SDK versions are in good shape, ranked by severity with a fix for every finding. On top of that, get notified by email or Slack when a project's health drops or hard bounces spike, so you hear about it before your recipients do. - [Bulk Suppression Management (Done)](https://lettermint.co/roadmap/suppressions-import-export.md): Moving to Lettermint from another provider? Bring your existing suppression list with you in one CSV import, so known bounces and opt-outs stay blocked from day one. You can also export your list to work with it in your own system, and unblock addresses in bulk. - [Spend Limits (Done)](https://lettermint.co/roadmap/spend-limits.md): Disable overage completely or set a maximum budget. When you hit the limit, we stop sending. No surprises on your bill. - [Terraform Provider (Done)](https://lettermint.co/roadmap/terraform-provider.md): The official Lettermint Terraform provider is published on the Terraform Registry as lettermint/lettermint. Define your projects, sending domains, routes and webhooks in Terraform, keep them in version control, and roll out the same setup across environments without clicking through the dashboard. - [More Official SDKs (Done)](https://lettermint.co/roadmap/dotnet-rust-elixir-symfony-sdks.md): Four new official SDKs, maintained by us so every new Lettermint feature lands in them too. Install the package for .NET, Rust, Elixir or Symfony and you're sending transactional and broadcast emails with a few lines of code. The community packages keep working if you already use them. - [Go SDK (Done)](https://lettermint.co/roadmap/go-sdk.md): Integrate Lettermint into your Go applications. No SMTP configuration needed, just install via go get and start sending. - [Python SDK (Done)](https://lettermint.co/roadmap/python-sdk.md): Works with Django, FastAPI, or any Python 3.9+ project. Supports both sync and async requests. - [Java SDK (Done)](https://lettermint.co/roadmap/java-sdk.md): Integrate Lettermint into your Java applications with a clean, type-safe API. Works with Spring Boot, Quarkus, or any JVM-based project. No SMTP configuration needed, just import the SDK and start sending transactional emails in minutes. - [Batch Email (Done)](https://lettermint.co/roadmap/batch-email.md): Bundle multiple emails and send them all at once. Fewer requests, faster processing. Perfect for imports, queues, or newsletters. - [Team API (Done)](https://lettermint.co/roadmap/team-api.md): Add domains, create projects, retrieve email statistics, and manage webhooks. All from your own application. - [Inbound Emails (Done)](https://lettermint.co/roadmap/inbound-emails.md): Build support ticket systems and process customer replies automatically. Includes spam filtering and attachment support. ## Changelog Latest updates and improvements to Lettermint - [Let your team log in with Single Sign-On (SSO)](https://lettermint.co/changelog/log-in-with-single-sign-on-sso.md): Connect Okta, Microsoft Entra ID or any other SAML or OIDC provider and let your team log in with SSO. SCIM keeps your team members in sync. - [Test your email integration with sandbox mode](https://lettermint.co/changelog/test-your-email-integration-with-sandbox-mode.md): Send real API and SMTP requests to a sandbox project. Lettermint handles every email as usual, except nothing gets delivered. - [The Lettermint CLI brings your email to the terminal](https://lettermint.co/changelog/transactional-email-cli.md): Send email, set up domains and test webhooks without opening the dashboard. Available for macOS, Linux and Windows. - [New SDKs for .NET, Rust, Elixir and Symfony](https://lettermint.co/changelog/new-sdks-for-dotnet-rust-elixir-and-symfony.md): Working with .NET, Rust, Elixir or Symfony? Our new official SDKs make it easy to send email from your application. - [Schedule your emails in advance with scheduled emails](https://lettermint.co/changelog/schedule-your-emails-with-scheduled-emails.md): Schedule your emails and let Lettermint send them when it suits you. Line up a campaign for Black Friday or send a follow-up three days after signup. - [Ask your AI assistant about your email delivery via MCP](https://lettermint.co/changelog/transactional-email-mcp-server.md): Connect Claude, ChatGPT or another assistant to Lettermint with our MCP server. See how your emails are doing and send them straight from your assistant. - [Set up webhooks for your whole team, multiple projects, or single routes](https://lettermint.co/changelog/webhooks-for-team-projects-or-routes.md): Decide how broadly your webhooks apply, from a single route to your whole team. No more separate webhook for every route. - [Import and export your suppressions in bulk](https://lettermint.co/changelog/import-and-export-suppressions.md): Import and export your suppressions as a CSV. Bring an existing list over in one go, or work with it in your own system. - [Rotate your DKIM keys automatically with managed DKIM](https://lettermint.co/changelog/managed-dkim-key-rotation.md): Managed DKIM rotates your DKIM keys on a schedule, without interrupting your sending. No key stays in use longer than it should. - [Send email only over an encrypted connection with Enforced TLS](https://lettermint.co/changelog/send-email-only-over-an-encrypted-connection-with-enforced-tls.md): We already encrypt the connection to the receiving server whenever we can. With Enforced TLS you decide what happens when that fails, per route or per message. - [Secure your API tokens with an IP allowlist](https://lettermint.co/changelog/restrict-your-api-tokens-to-specific-ip-addresses.md): An extra layer of security on your API tokens protects your sending at IP level. You decide which servers are allowed to send. - [Give team members and clients exactly the right access (RBAC)](https://lettermint.co/changelog/give-team-members-and-clients-the-right-access-rbac.md): Create your own roles and decide per team member or client what they can see and do. Role-based access control (RBAC) is now available. - [Automatic plain text fallback for your emails](https://lettermint.co/changelog/plain-text-email-fallback.md): Sending HTML-only emails? Turn on the plain text fallback and every email automatically gets a text version. So they land in the inbox more often. - [WP-CLI now available in our WordPress plugin](https://lettermint.co/changelog/wordpress-plugin-wp-cli-support.md): Our WordPress plugin now supports WP-CLI. Set up Lettermint and manage emails from the command line, useful when you maintain many WordPress websites. - [Adding passkeys to our new dashboard](https://lettermint.co/changelog/login-with-passkeys.md): Log in with passkeys and use your fingerprint, face or device PIN instead of a password. - [Hide sensitive email content in your dashboard](https://lettermint.co/changelog/hide-email-content-in-your-dashboard.md): Email content can now be hidden per project or route. Keep sensitive data out of view from anyone with dashboard access. - [Team API now available in our SDKs](https://lettermint.co/changelog/team-api-now-available-in-our-sdks.md): Our SDKs have been updated to v2 and now support the Team API. Manage domains and projects and retrieve stats right from your code. - [New dashboard available in public beta](https://lettermint.co/changelog/new-dashboard-available-in-public-beta.md): We've completely redesigned our dashboard. Read about what's changed and what you can expect. - [Lettermint now available in Mailcoach](https://lettermint.co/changelog/lettermint-now-available-in-mailcoach.md): Lettermint is now available as a mailer in Mailcoach. Send your campaigns and marketing emails through Lettermint. - [Turn email tracking on or off per individual email](https://lettermint.co/changelog/email-tracking-per-email-on-off.md): Turn email tracking on or off per individual email. Decide yourself when open and click tracking is active, independent of your route settings. - [Listmonk integration, send newsletters with Lettermint](https://lettermint.co/changelog/listmonk-integration-send-newsletters-with-lettermint.md): Lettermint is now available as a preset in Listmonk. Connect your self-hosted newsletter tool to Lettermint in just a few clicks. - [Email statistics now available via the Stats API](https://lettermint.co/changelog/email-statistics-now-available-via-the-stats-api.md): Retrieve email statistics via the Lettermint Stats API. View sent emails, bounces, opens and clicks per day or per project. - [Receive a weekly overview in your inbox with Weekly Reports](https://lettermint.co/changelog/weekly-reports-automatic-email-report-of-your-performance.md): Automatically receive a weekly email report with your sending statistics, bounces, open rates and more. Always up to date without having to log in. - [Java SDK now available](https://lettermint.co/changelog/java-sdk-now-available.md): Send emails from your Java applications with our official Java SDK. Available on Maven Central, integrate via Maven or Gradle. - [Track email performance with open tracking and click tracking](https://lettermint.co/changelog/email-tracking-open-tracking-click-tracking.md): Gain insight into email performance with email tracking. View open rates and click rates with open tracking and click tracking. Privacy-first and GDPR-compliant. - [Prevent extra costs with Spend Limits](https://lettermint.co/changelog/prevent-extra-costs-with-spend-limits.md): Set a spending limit and never pay more than your subscription price. Disable overage and maintain full control over your email costs. - [Go SDK now available](https://lettermint.co/changelog/go-sdk-now-available.md): Send emails from your Golang projects with our official Go SDK. No SMTP configuration needed, integrate directly via go get. - [Python SDK Now Available](https://lettermint.co/changelog/python-sdk-now-available.md): Integrate Lettermint into your Python applications with our new SDK and easily send emails from your Python code. - [Send multiple emails at once with batch email](https://lettermint.co/changelog/send-multiple-emails-at-once-with-batch-email.md): Send up to 500 emails in a single API request with our new batch endpoint. Bundle multiple emails and send them all at once. Fewer requests, faster processing. - [Manage your account with the new Team API](https://lettermint.co/changelog/team-api-now-in-preview-manage-your-account-via-api.md): Manage your entire Lettermint environment via the API. The Team API is now in preview and offers full control over domains, projects, emails and more. - [Receive and process emails with Inbound Emails](https://lettermint.co/changelog/inbound-emails-receive-process-emails-webhooks.md): Receive and process emails automatically with Inbound Emails via webhooks. Including attachments, spam filtering and structured JSON data. - [Add inline images to emails with Content-ID (CID)](https://lettermint.co/changelog/inline-images-email-content-id-support.md): Add inline images to emails with Content-ID, without external hosting. Perfect for logos, signatures and newsletters that remain always visible. - [Prevent emails from landing in spam with Spam Insights](https://lettermint.co/changelog/prevent-emails-from-landing-in-spam-with-spam-insights.md): Spam Insights gives you visibility into all your emails sent through Lettermint and shows you how to keep your messages out of the spam folder. - [Improved Suppressions Management](https://lettermint.co/changelog/improved-suppressions-management.md): Easily manage blocked email addresses with our improved Suppressions Management. Prevent unsubscribed contacts and bounces from accidentally being emailed. - [Lettermint module for Nuxt now available](https://lettermint.co/changelog/lettermint-module-nuxt-now-available.md): Send transactional emails from your Nuxt website with our official Nuxt module. Integrate Lettermint in both client-side and server-side. - [Organize and categorize emails with tags for better overview](https://lettermint.co/changelog/organize-and-categorize-emails-with-tags-for-better-overview.md): Organize emails with tags and categorize them to maintain better oversight in your Lettermint dashboard. - [Time to Inbox monitoring page launched](https://lettermint.co/changelog/time-to-inbox-monitoring-page-launched.md): Discover how fast transactional emails really reach the inbox. From API call to inbox delivery. Real-time insights into Lettermint's Time to Inbox. - [Webhooks for sent emails](https://lettermint.co/changelog/webhooks-sent-emails.md): Receive real-time notifications of sent emails with our new webhooks feature. Integrate webhooks into your application(s) to stay updated on all email activity including status updates, bounces, and more. - [Send Campaigns and Newsletters with Lettermint Broadcast](https://lettermint.co/changelog/marketing-campaigns-newsletters-lettermint-broadcast.md): In addition to transactional emails, you can now also send marketing campaigns and newsletters with Lettermint Broadcast. Our European infrastructure ensures your marketing emails are delivered quickly and securely to your customers and subscribers. - [Free plan now without daily limits](https://lettermint.co/changelog/developer-plan-now-without-daily-limit.md): Send up to 300 emails per month without a daily limit. We’ve removed the daily limit for the Free plan, so you can now send up to 300 emails per month without any per-day restriction. - [Prevent duplicate emails with idempotency](https://lettermint.co/changelog/prevent-duplicate-emails-with-idempotency.md): With idempotency, you can prevent duplicate emails. This new feature ensures that your customers never receive the same email multiple times, even with repeated send attempts via our API or other integrations. - [Lettermint Integration for Magento Now Available](https://lettermint.co/changelog/lettermint-magento-integration-available.md): Send transactional emails from your Magento webshop with the new Lettermint integration. Order confirmations, shipping notifications, and account alerts now always arrive reliably. - [Lettermint Now Available on Make](https://lettermint.co/changelog/lettermint-make-integration.md): Easily connect Lettermint with various apps via Make to send transactional emails. Use a no-code solution to automate your email workflows. - [WordPress Plugin Update v1.1 Available](https://lettermint.co/changelog/lettermint-wordpress-update-v1-1-0.md): We've updated the Lettermint WordPress plugin to version 1.1.0. This update includes an improved interface and new features, including custom routes and additional insights into sent emails via WordPress. - [Lettermint Now Available on Zapier](https://lettermint.co/changelog/lettermint-zapier-integration.md): Easily connect Lettermint with over 8,000 apps via Zapier to send transactional emails. Use a no-code solution to automate your emails. - [New add-on for Unlimited Domains](https://lettermint.co/changelog/unlimited-domains-addon.md): For users who send emails from multiple low-volume domains, we are introducing the Unlimited Domains add-on. This add-on is available with our Starter and Growth plans. - [WordPress Plugin Now Available](https://lettermint.co/changelog/lettermint-wordpress-plugin.md): Easily integrate Lettermint into your WordPress website with our new plugin. Effortlessly send transactional emails from your WordPress website or WooCommerce store. - [Node.js SDK Now Available](https://lettermint.co/changelog/lettermint-node-sdk-available.md): Integrate Lettermint into your Node.js application(s) with our new SDK, and easily send emails from your JavaScript code. - [Laravel SDK and PHP SDK Now Available](https://lettermint.co/changelog/lettermint-laravel-php-sdk-available.md): Our new SDKs make it easy to integrate Lettermint with both Laravel and PHP, allowing you to quickly add email functionality to your applications. ## Blog Insights and articles about email delivery and best practices - [Freshly Minted: what's new in September](https://lettermint.co/blog/freshly-minted-whats-new-in-september.md): Our September roundup with an MCP server for your AI assistant, scheduled emails, the Lettermint CLI, new SDKs and a batch of smaller improvements. - [Freshly Minted: what's new in August](https://lettermint.co/blog/freshly-minted-whats-new-in-august.md): Our August roundup with our ISO 27001 certification and a batch of smaller improvements. - [Freshly Minted: what's new in July](https://lettermint.co/blog/freshly-minted-whats-new-in-july.md): Our July roundup with custom roles and permissions, tighter control over your API tokens, a toggle that stops out-of-office replies and a batch of smaller improvements. - [Freshly Minted: what's new in June](https://lettermint.co/blog/freshly-minted-whats-new-in-june.md): Our first monthly roundup with a brand new Lettermint dashboard, Team API support in our SDKs, WP-CLI for WordPress and a batch of smaller fixes. - [Lettermint is ISO 27001 certified](https://lettermint.co/blog/lettermint-iso-27001-certified.md): Lettermint is now an ISO 27001 certified email provider. Read what the certification covers and what it means for the security of your email data. - [Lettermint turns 1 and we're just getting started](https://lettermint.co/blog/lettermint-turns-1-and-we-are-just-getting-started.md): 2025 was our first year. A look back at what we achieved and a glimpse of what 2026 will bring. - [We're making our email speed public](https://lettermint.co/blog/were-making-our-email-speed-public.md): Real-time insights into the speed of our infrastructure for delivering transactional emails from Europe. - [Welcome to the future of transactional mailing](https://lettermint.co/blog/welcome-future-transactional-mailing-europe.md): We’re excited to announce the launch of Lettermint, your European provider for transactional emails. Never worry about email delivery again — Lettermint ensures your messages are secure, reliable, and always reach your customers. ## Knowledge Base Learn how to use Lettermint effectively - [How to use a Discount Code?](https://lettermint.co/knowledge-base/account/how-to-use-a-discount-code.md): Have you received a discount code? Follow these steps to activate the code and get a discount on your Lettermint subscription. - [Verified account required to send emails, this is why](https://lettermint.co/knowledge-base/account/verified-account-required-to-send-emails-this-is-why.md): Want to send emails with Lettermint? A verified account is required. We'll explain why this is necessary. - [What is DMARC?](https://lettermint.co/knowledge-base/definitions/what-is-dmarc.md): If you send emails with your domain, you undoubtedly have a DMARC record in your DNS. But what is DMARC and what does it do? We'll explain it to you. - [What is SPF?](https://lettermint.co/knowledge-base/definitions/what-is-spf.md): SPF protects your domain against email abuse. Learn how to set up SPF, what the limits are, and how Lettermint cleverly handles SPF via Return-Path. - [What is DKIM?](https://lettermint.co/knowledge-base/definitions/what-is-dkim.md): DKIM adds a digital signature to your emails. Discover how DKIM works, why it's important, and how to set it up with Lettermint. - [What is DKIM2?](https://lettermint.co/knowledge-base/definitions/what-is-dkim2.md): DKIM2 is the next version of DKIM with improved security and support for forwarded emails. Learn what DKIM2 is and why it matters for email authentication. - [What is SMTP?](https://lettermint.co/knowledge-base/definitions/what-is-smtp.md): SMTP is the protocol behind email sending. Learn what SMTP is, how it works, which ports to use, and why proper configuration matters for deliverability. - [What is MX (Mail Exchange)?](https://lettermint.co/knowledge-base/definitions/what-is-mx.md): An MX record tells mail servers where to deliver emails. Learn what an MX record is, how it works and why it matters for email delivery. - [What is the List-Unsubscribe header in newsletters and marketing emails?](https://lettermint.co/knowledge-base/definitions/what-is-list-unsubscribe-header.md): The List-Unsubscribe header lets recipients unsubscribe with one click. Learn how it works, why Gmail and Yahoo require it, and how to set it up. - [What are email headers and what do they tell you about your emails?](https://lettermint.co/knowledge-base/definitions/what-are-email-headers.md): Email headers contain information about the sender, routing, authentication and more. Learn what headers are and how to use them. - [Understanding email statuses: hard bounce, delivered, pending, and more](https://lettermint.co/knowledge-base/deliverability/understanding-email-statuses-hard-bounce-delivered-pending.md): Discover the meanings of email statuses like hard bounce, delivered, and pending to enhance your email deliverability and campaign performance. - [Managed DKIM and automatic key rotation](https://lettermint.co/knowledge-base/deliverability/managed-dkim-and-key-rotation.md): Upgrade to managed DKIM without interrupting email sending. Learn why two CNAME records are required and when to remove the old DKIM TXT record. - [Test emails with our test email addresses and prevent problems](https://lettermint.co/knowledge-base/deliverability/test-emails-with-our-test-email-addresses-and-prevent-problems.md): Send test emails using our test email addresses and prevent your emails from being marked as spam or unsafe. Free to use for Lettermint customers. - [What is greylisting and why doesn't email arrive immediately?](https://lettermint.co/knowledge-base/deliverability/what-is-greylisting-why-email-delayed.md): Email not arriving right away? Greylisting is often the cause. Learn what this antispam technique is, how it works and how to prevent email delays. - [How to prevent your emails from going to spam during holidays (Gmail & Outlook)](https://lettermint.co/knowledge-base/deliverability/prevent-emails-spam-holidays-gmail-outlook.md): Gmail and Outlook spam filters get stricter during Black Friday, Cyber Monday, and holidays. Learn how to keep your emails in the inbox, not spam. - [What is an email subdomain and when should you use one](https://lettermint.co/knowledge-base/deliverability/what-is-an-email-subdomain-and-when-should-you-use-one.md): Learn what an email subdomain is and why it's crucial for transactional emails. Including when to use subdomains and how to set them up. - [Why is my email blocked? Policy Rejected explained](https://lettermint.co/knowledge-base/deliverability/why-is-my-email-blocked-policy-rejected-explained.md): Your email gets the Policy Rejected status when the spam score is too high. Learn why this happens and how to make sure your emails get delivered. - [Outlook blocks SVG images in emails, here's what you need to know](https://lettermint.co/knowledge-base/deliverability/outlook-blocks-svg-images-in-emails.md): Since October 2025, Outlook on the web and new Outlook for Windows hide inline SVG images. See why, which versions are affected and which format to use instead. - [Stop bot signups and prevent spam complaints and delivery issues](https://lettermint.co/knowledge-base/deliverability/stop-bot-signups-prevent-spam-complaints.md): Bot signups cause spam complaints and damage your sender reputation. Learn how CAPTCHA, honeypots and IP blocking protect your forms. - [Why are my emails going to spam? Common causes and how to fix them](https://lettermint.co/knowledge-base/deliverability/why-are-my-emails-going-to-spam.md): Your emails keep landing in the spam folder, but you're not sure why. Learn the most common causes and what you can do to reach the inbox again. - [Integrate Lettermint in WordPress with WP Mail SMTP](https://lettermint.co/knowledge-base/guides/integrate-lettermint-with-wordpress-wp-mail-smtp.md): Do you want to use Lettermint in WordPress to send emails? With the free `WP Mail SMTP` plugin, it's very easy. - [How to send a newsletter with Mailcoach and Lettermint?](https://lettermint.co/knowledge-base/guides/mailcoach-send-newsletter-with-lettermint.md): Send your newsletter with Mailcoach and Lettermint. This guide walks you through connecting Lettermint to Mailcoach for email delivery. - [How to set up Apple Branded Mail for your business or brand?](https://lettermint.co/knowledge-base/guides/how-to-set-up-apple-branded-mail-for-your-business.md): Set up Apple Branded Mail for your business. Display your logo in Apple Mail with this free step-by-step guide. Works automatically with Lettermint. - [Using Lettermint SMTP for Synology Email Notifications in DSM](https://lettermint.co/knowledge-base/guides/lettermint-smtp-synology-email-notifications-dsm.md): Use Lettermint SMTP to send email notifications from your Synology NAS. Follow this step-by-step guide to set up Mail Notifications. - [How to add DNS records to Cloudflare for Lettermint?](https://lettermint.co/knowledge-base/guides/add-dns-records-cloudflare.md): Step-by-step guide to add DMARC, DKIM and DNS records to Cloudflare to send transactional emails with Lettermint. - [How to add DNS records to Domain Chief for Lettermint?](https://lettermint.co/knowledge-base/guides/add-dns-records-domain-chief.md): Step-by-step guide to add DNS records to Domain Chief to send transactional emails with Lettermint. - [How to add DNS records to TransIP for Lettermint?](https://lettermint.co/knowledge-base/guides/add-dns-records-transip.md): Step-by-step guide to add DNS records to TransIP to send transactional emails with Lettermint. - [How to add DNS records to Neostrada for Lettermint?](https://lettermint.co/knowledge-base/guides/add-dns-records-neostrada.md): Step-by-step guide to add DNS records to Neostrada to send transactional emails with Lettermint. - [How to Add DNS Records to AWS Route 53 for Lettermint?](https://lettermint.co/knowledge-base/guides/add-dns-records-aws-route-53.md): Step-by-step guide to add DNS records to Amazon Route 53 to send transactional emails with Lettermint. - [How to send a newsletter with Listmonk and Lettermint?](https://lettermint.co/knowledge-base/guides/send-newsletter-with-listmonk.md): Send your own newsletter with Listmonk and Lettermint. This guide walks you through connecting Listmonk to Lettermint for email delivery. - [Send without domain limitations using our add-on](https://lettermint.co/knowledge-base/product/unlimited-domains-with-lettermint.md): With the Lettermint Unlimited Domains add-on, you can use an unlimited number of sending domains with our Starter and Growth plans. - [What is the Difference Between Transactional and Broadcast Emails?](https://lettermint.co/knowledge-base/product/difference-transactional-broadcast-emails.md): Discover the difference between Transactional and Broadcast emails for optimal delivery directly to your recipients' inboxes. - [Why is there an automatic unsubscribe link in broadcast emails?](https://lettermint.co/knowledge-base/product/why-automatic-unsubscribe-link-broadcast-emails.md): Discover why an unsubscribe link is required for broadcast emails under GDPR. Learn how it protects your sending reputation and when you can disable it. - [What is Delivery Health and does it affect your emails?](https://lettermint.co/knowledge-base/product/what-is-delivery-health-and-does-it-affect-your-emails.md): Delivery Health is a status in your Lettermint dashboard that shows how your email sending is doing. Learn what it means and when to take action.