Everything you need to validate, build, and monitor a domain's email authentication.
See your complete authentication posture, letter grade, and prioritized fixes.
Parse your record, trace every include, and catch the 10-lookup limit.
Choose your senders and build a clean, conservative SPF record.
Inspect policy, alignment, reporting, and enforcement at a glance.
Create a staged DMARC policy with reporting that is safe to roll out.
Look up a selector and inspect the public key behind your signatures.
Probe 50+ known provider selectors automatically—no guessing required.
Map mail exchangers and resolve their IPv4 and IPv6 addresses in parallel.
Verify your logo, DMARC enforcement, and certificate configuration.