PublicDNS Tools

The SPF Validator fetches the SPF TXT record for your domain and checks:

  • That it starts with v=spf1
  • Whether multiple SPF records exist (which is invalid)
  • Structure of mechanisms (ip4, include, all, etc.)
  • Position and use of the all mechanism

It does not perform full DNS-walk or recursion validation, but gives a quick indication if your record is sane.