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Is Email Auth Checker reliable?

Reliable (measured) Yes. Faceabot measured Email Auth Checker 4 times: 100% of checks succeeded, including the last 4 in a row (last check 2026-10-19 19:50 UTC). It also does the job: its real read-only task worked 4 of 4 times.

Last check: 2026-10-19 19:50 UTC · answered in 7582 ms · remote (no install)

En français : Fiable (mesuré). Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

SPF, DKIM, DMARC, MTA-STS and domain-expiry checks for any domain, with SPF lookup counts.

Source: official MCP registry (registry.modelcontextprotocol.io) · version 1.0.0 · publisher website
Connect your agent
{
  "mcpServers": {
    "email-auth-check": {
      "url": "https://email-auth-check.quietworklabs.workers.dev/mcp"
    }
  }
}
Or ask Faceabot first: MCP tool check_reliability {"id":"dev.workers.quietworklabs.email-auth-check/email-auth-check"} on https://faceabot.com/api/mcp.
Does it actually do the job?

Does the job (tested) — Faceabot asked spf_lookup_count to do a small read-only task 4 time(s): 4 returned a real result, the last 4 in a row. Last result: ok in 3133 ms.

Sample input: {"domain":"github.com"}. A success means a non-empty result without error; it does not certify the accuracy or safety of the content.
Other proven tools for the same job

DnsGuard Reliable (measured) · 100%
Check a domain's email authentication: SPF, DKIM, DMARC, BIMI, MX, MTA-STS, TLS-RPT. Score + fixes. · https://dnsguard.mike-tusa.workers.dev/mcp

Domain Health Reliable (measured) · 100%
Domain checks: SPF, DKIM, DMARC, BIMI, MTA-STS, SSL/TLS and HTTP security headers. · https://mcp.modernmustardseed.com/domain-health

secureIT Sicherheits-Checks Reliable (measured) · 100%
Kostenlose Sicherheits-Checks ohne Konto: SPF/DKIM/DMARC, Mails, Links, Webseiten, Passwort-Leaks. · https://secureit.icu/mcp

Picked from Faceabot's live measurements. Or let Faceabot choose: GET https://faceabot.com/resolve?need=…
Faceabot measurements
WhenAnswersReal taskLatency
2026-10-19 19:50 UTC✅ ok✅ done7582 ms
2026-10-19 06:35 UTC✅ ok✅ done5609 ms
2026-10-18 14:10 UTC✅ ok✅ done6577 ms
2026-10-18 04:00 UTC✅ ok✅ done7199 ms
Method: MCP initialize then tools/list from Faceabot (FaceabotProbe/1.0), plus one read-only tool call with a neutral input when the server declares one, repeated over time. This checks that the server is up and speaks MCP correctly; it does not certify the quality or safety of each tool. How measurement works.

Find tools similar to Email Auth Checker →

Publisher of Email Auth Checker?

Show your measured reliability on your README or website:

Faceabot reliability badge for Email Auth Checker

[![Measured by Faceabot](https://faceabot.com/badge/dev.workers.quietworklabs.email-auth-check/email-auth-check.svg)](https://faceabot.com/tools/dev.workers.quietworklabs.email-auth-check/email-auth-check)
Data in JSON: /api/catalog?id=dev.workers.quietworklabs.email-auth-check/email-auth-check · Stop probes: POST /api/reliability/opt-out

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