Email & Deliverability
SPF, DKIM, DMARC, MX, reverse DNS, MTA-STS, TLS-RPT, BIMI and DANE - plus header and DMARC report analysers.
Email Authentication Checker
MX, SPF, DKIM, DMARC, reverse DNS, MTA-STS, TLS-RPT and BIMI scored out of 100.
SPF Checker & Validator
Validates syntax, follows includes and counts the 10-DNS-lookup limit. Paste a record to validate it before publishing.
DKIM Checker / Selector Lookup
Check a DKIM key by selector, or try 40+ common selectors to find it.
DMARC Checker & Policy Analyzer
Parses every DMARC tag, explains the policy and verifies external report addresses.
MX Checker
Checks each mail server resolves, is not a CNAME/IP, has reverse DNS and forward confirmation.
Reverse DNS / PTR Checker
Checks PTR and forward-confirmed reverse DNS for a sending IP.
MTA-STS Checker
Checks the _mta-sts record and the HTTPS policy file, and that the policy covers your MX hosts.
TLS-RPT Checker
Checks the SMTP TLS reporting record (_smtp._tls).
BIMI Checker
Checks the BIMI record, logo URL and the DMARC enforcement BIMI requires.
DANE / TLSA Checker
Finds TLSA records for each mail server and checks they are DNSSEC-protected.
Email Header Analyzer
Paste raw message headers: delivery path, delays, SPF/DKIM/DMARC results.
DMARC Report Analyzer
Upload a DMARC aggregate report (.xml, .gz or .zip) and see who sends mail as your domain.