Official MCP RegistryListed
scan.mx Email Diagnostics
Email deliverability check: MX, SPF, DKIM, DMARC, blacklists, MTA-STS, DNSSEC, BIMI. Graded, no key.
First seen 2 Oct 2026. Evidence as of 13 Oct 2026.
6
Tools
From an anonymous probe
1
Source listings
Each with its own history
1
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| 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. | Read-only |
| 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. | Read-only |
| check_dmarc | Check the domain DMARC policy at _dmarc: presence, policy strength (none/quarantine/reject), and reporting. | Read-only |
| 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, where specific weaknesses cap the grade), 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: the probe is non-blocking, so when smtp_status is "pending" or "running" call this tool again (poll_after_seconds hints how long to wait) until smtp_status is "complete" and the SMTP checks appear in checks. | Read-only |
| check_mx | Check the MX records of a domain: presence, hostnames, resolution, null-MX, and common misconfigurations. | Read-only |
| check_spf | Check the domain SPF policy: presence, syntax, the all qualifier, and the 10-lookup limit. | Read-only |
Change history
- Description changed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | mx.scan/diagnostics | 2 Oct 2026 | 13 Oct 2026 | 2 |