mxtoolbox.com valid

MxToolbox

MxToolbox is the leading provider of email deliverability, DNS, and network diagnostic tools. Our SuperTool runs hundreds of free lookups (MX, SPF, DKIM, DMARC, BIMI, MTA-STS, TLS-RPT, blacklist, and more) to help engineers and email administrators monitor and troubleshoot their domains.

Authority
65 reach 19 · trust 10 · quality 21 · freshness 15
Tier
listed
llms.txt
https://mxtoolbox.com/llms.txt
Sections
4
Links
20
Size
2533 bytes
Popularity rank
#3886
Registered
2004-09-28
First seen
2026-10-18T14:18:43.759Z
Last checked
2026-10-18T14:37:56.472Z
Badge
Agent Web Map badge for mxtoolbox.com

Own this site? Verify it

Verified listings rank first, reach the featured tier (do-follow links) at 60 authority instead of 70, get a link in our llms.txt, a badge, breakage alerts, an editable profile, lookup analytics, and instant re-crawls. Prove ownership with any one of these, then call the verify endpoint (or your agent can do all of it, also over MCP).

  1. llms.txt link (recommended) — add this line to your llms.txt:
    - [Agent Web Map](https://agentwebmap.com/domain/mxtoolbox.com?verify=awm_fc1e37a9c7d51152a52e9f5affbb1c15)
  2. DNS — add a TXT record:
    _agentwebmap.mxtoolbox.com. TXT "awm-verify=awm_fc1e37a9c7d51152a52e9f5affbb1c15"
  3. Meta tag — in your homepage <head>:
    <meta name="agentwebmap-verify" content="awm_fc1e37a9c7d51152a52e9f5affbb1c15">
  4. Well-known file — serve the token at:
    https://mxtoolbox.com/.well-known/agentwebmap-verify.txt  ->  awm_fc1e37a9c7d51152a52e9f5affbb1c15

Then: curl -X POST https://agentwebmap.com/v1/sites/mxtoolbox.com/verify — the response contains your API key. Full docs.

Machine-readable: GET /v1/domain/mxtoolbox.com · this page as Accept: application/json or text/markdown · MCP lookup_domain