If you have spotted that some of your emails have failed SPF (Received-SPF: PermError) due to invalid mechanism, here are some things that you may have caused this and you need to double check:

  • When constructing an SPF record using an SPF record generator do not copy and paste the results, type them manually carefully.
  • Check your SPF record closely for invalid characters, sometimes they may be hard to spot.
  • Check your SPF record for outdated entries as some receivers may treat your whole record as invalid if for example one of your “include” statements includes outdated information.
  • Do not use “+” qualifier in front of your mechanisms as it is already implied.
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