Connection check
verified live · 26h ago
diagnostics-2
Check email deliverability for a domain: MX, SPF, DKIM, DMARC, blacklists. Graded, no key.
Tools
6
GitHub stars
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Installs / wk
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Licence
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Transport
streamable-http
Last checked
26h ago
Tools & capabilities
6 toolsRead from the running server on 26h ago.
check_blacklist
read-only
domain*
Check whether the domain and its mail server IPs are listed on the Spamhaus (ZEN, DBL, ZRD, AuthBL), SpamCop, GBUdb and PSBL blocklists. 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
read-only
domain*selector
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. 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.
check_dmarc
read-only
domain*
Check the domain DMARC policy at _dmarc: presence, policy strength (none/quarantine/reject), and reporting. Check the domain DMARC policy at _dmarc: presence, policy strength (none/quarantine/reject), and reporting.
check_domain
read-only
domain*include_smtp
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… 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.
check_mx
read-only
domain*
Check the MX records of a domain: presence, hostnames, resolution, null-MX, and common misconfigurations. Check the MX records of a domain: presence, hostnames, resolution, null-MX, and common misconfigurations.
check_spf
read-only
domain*