{"query":"mailtester.com","mode":"domain","best":{"domain":"mailtester.com","status":"valid","tier":"listed","authority":51,"verified":false,"title":"MailTester","summary":"MailTester (mailtester.com) is an email verification and deliverability testing platform. It cleans lists by removing invalid, risky, disposable and spam-trap addresses, and it tests where real campaigns land — inbox, promotions tab or spam — across Gmail, Outlook, Yahoo and other providers, with SPF/DKIM/DMARC checks and round-the-clock blacklist monitoring. Single-address checks, bulk list cleaning and an API are all available. Start free with 100 credits, no credit card.","llms_txt":"https://mailtester.com/llms.txt","llms_full_txt":null,"last_checked":"2026-10-20T02:34:46.637Z","agent_terms":null,"categories":[],"capabilities":[],"inferred_tags":[],"audience":null,"agent_uses":[],"language":null,"platform_generated":null,"agent_summary":null,"llms_txt_cached":"https://agentwebmap.com/v1/domain/mailtester.com/llms.txt","why":["authority 51 (listed)","checked 975 minutes ago"]},"read":{"llms_txt":"https://mailtester.com/llms.txt","llms_full_txt":null,"nested_llms_txt":[]},"terms":null,"health":{"ok":true,"status":"valid","tier":"listed","authority":51,"last_checked":"2026-10-20T02:34:46.637Z","checked_minutes_ago":974,"stale":false,"max_age_seconds":86400,"live_checked":false,"http_status":200,"last_valid":"2026-10-20T02:34:46.637Z","content_hash":"3a09e9d730651c102ab1efbe73bd9872"},"sources":[],"match":{"strength":"domain","reason":"Exact domain or its registered publisher."},"provenance":{"selection":"directory","verification":"domain_ownership","terms":"unknown","excerpts":"publisher_link_metadata","health":"stored_crawl"},"alternatives":[],"watch":"POST https://agentwebmap.com/v1/watch with {\"domain\": \"mailtester.com\", \"webhook_url\": \"https://your-endpoint\"} to be told when its llms.txt changes or breaks"}