SPF records (another site)

After my post the other day on SPF records, I would being doing a dis-service to everyone if I didn’t post the equally groovy http://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/ – gives the same results, but explains a bit more about SPF records and the like.

Also, for those who are interested/want to know more, the wikipedia article on SPF is also great- http://en.wikipedia.org/wiki/Sender_Policy_Framework – and clarifies the difference’s between +,  ~, and ? ‘s (you know, one of those difficult questions in life!)- from Wikipedia:


Each mechanism can be combined with one of four qualifiers:

  • + for a PASS result. This can be omitted; e.g., +mx is the same as mx.
  • ? for a NEUTRAL result interpreted like NONE (no policy).
  • ~ for SOFTFAIL, a debugging aid between NEUTRAL and FAIL. Typically, messages that return a SOFTFAIL are accepted but tagged.
  • - for FAIL, the mail should be rejected.

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