scan.mx Email Diagnostics

mx.scan/diagnostics

Check email deliverability for a domain: MX, SPF, DKIM, DMARC, blacklists. Graded, no key.

healthy

status

tools exposed

368ms

connect latency

c984cab24b3b

schema fingerprint

Tools (6)

check_domain

Run the full email and DNS deliverability check for a domain: MX, SPF, DKIM, DMARC, DNS health, provider detection, and blacklists. Returns a letter grade (A to F), a 0 to 100 score, and every individual check with its RFC reference. Set include_smtp to also run a live SMTP probe of the mail servers

check_mx

Check the MX records of a domain: presence, hostnames, resolution, null-MX, and common misconfigurations.

check_spf

Check the domain SPF policy: presence, syntax, the all qualifier, and the 10-lookup limit.

check_dmarc

Check the domain DMARC policy at _dmarc: presence, policy strength (none/quarantine/reject), and reporting.

check_blacklist

Check whether the domain and its mail server IPs are listed on the Spamhaus (ZEN, DBL, ZRD, AuthBL), SpamCop, GBUdb and PSBL blocklists.

check_dkim

Check DKIM signing keys for a domain. Without a selector, common provider selectors are probed. Pass an explicit selector to look up that exact key at selector._domainkey.

Endpoint

https://api.scan.mx/mcp
Category: Other · Last checked: 2026-07-30T14:02:30Z

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How we measure →

What this means. This server responded to the MCP handshake and listed its tools without authentication. The schema fingerprint lets us flag if tool signatures silently change (schema drift) between checks.