Free email authentication tools
Free tools for email authentication: DMARC, SPF and DKIM checkers, DMARC and SPF record generators, and a DMARC report analyzer that runs in your browser.
Checkers
- DMARC checkerLook up any domain’s DMARC record and see its policy, reporting addresses, alignment and subdomain rules, with a grade and the exact fixes. Free, no sign-up.
- SPF checker and lookup counterCheck any domain’s SPF record, count its DNS lookups against the 10-lookup limit, and catch +all, ?all, duplicate records and other errors. Free and instant.
- DKIM checkerFind a domain’s DKIM keys on common selectors or your own, and check key type, key length and revoked keys. Free DKIM lookup for any domain, no sign-up.
Generators
- DMARC record generatorBuild a valid DMARC record in seconds: choose a policy, reporting address, alignment and subdomain policy, then copy the TXT record to publish at _dmarc.
- SPF record generatorPick the services that send your email, add your own servers and get a valid SPF record with the right includes, a lookup count and the right ending.