Free email authentication tools

Everything runs live against DNS. No signup needed.

• Domain health check

  SPF, DKIM, DMARC and MX in one report with a score.

• DMARC checker

  Validate your policy, reports and alignment.

• SPF checker

  Follow includes and count lookups against the limit of 10.

• DKIM checker

  Find DKIM keys and check their strength.

• MX lookup

  See which servers receive a domain's mail.

• SPF generator

  Build one clean SPF record for all your senders.

• DMARC generator

  Create or upgrade a DMARC record without losing reports.