Outbound Domain Health Checker
Inspect public MX, SPF, and DMARC records before planning outbound. See what was found, what is missing, and what still needs a deeper check.
A DNS snapshot, not a readiness score
Enter the exact sending domain. The tool queries MX and TXT records plus _dmarc at that domain. It distinguishes missing records from lookup failures. Subdomain results are exact-host checks; organizational-domain DMARC inheritance is not evaluated. No email is sent and no DNS setting is changed.
Interpret each record
MX describes inbound mail routing, not permission to send. A null MX means the domain declares that it does not receive mail. SPF declares authorized senders; finding a single record does not validate every include or the ten-lookup limit. DMARC publishes policy; p=none is monitoring, not enforcement. Multiple SPF or DMARC records need attention.
What this checker cannot verify
DKIM needs a selector and is not checked here. Domain age, TLS, blacklists, sender reputation, mailbox warm-up, actual SPF/DKIM alignment, and inbox placement are not measured. Authentication helps but does not guarantee delivery. Review DNS changes with your email administrator; an incorrect strict policy can affect legitimate mail.
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