Everything you need to validate, build, and monitor a domain's email authentication.
All checks in one click. Letter grade + per-section findings.
Parse a record, count DNS lookups, catch the 10-lookup limit.
Pick ESPs + IPs and get a clean record.
Read the policy at _dmarc.{your-domain}.
Wizard for a safe, conservative DMARC record.
Look up a selector and inspect the key.
Probe 50+ known ESP selectors automatically.
List mail exchangers + resolve A/AAAA in parallel.
Verify logo + DMARC enforcement + VMC.