spf-discuss
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[spf-discuss] Re: spf2.0/mfrom

2007-11-28 16:24:00
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Stuart D. Gathman wrote:
Does anyone have any stats on whether there are enough spf2.0/mfrom
records out there to be worth checking for?  I don't care about
spf2.0/pra (not being much interested in protecting Resent-Sender),
but spf2.0/mfrom is equivalent to SPF, and the more SPF policies the
better.

- From a rather large e-mail database (whose exact source and nature I can't 
disclose due to an NDA, but it has > 100 million messages from the last 
few months):

(Fixed-width font required for proper viewing!)


   # domains with "spf2.0/...,mfrom,..."
  --------------------------------------- ~= 0.0052
    # domains with "v=spf1" or "spf2.0"


   # messages with "spf2.0/...,mfrom,..."
  ---------------------------------------- ~= 0.0064
    # messages with "v=spf1" or "spf2.0"


I'll leave drawing conclusions up to you ...

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