spf-discuss
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RE: Re: getting 2822 protection as well as 2821 protection

2004-04-08 07:58:39
From: Greg Connor
Sent: Thursday, April 08, 2004 3:29 AM


<...>

--Jim Ramsay <i(_dot_)am(_at_)jimramsay(_dot_)com> wrote:
I would suggest that maybe an explicit match is too strict.  My
explanation is long-winded, so please bear with me :)
[...]

I propose a way of matching the Envelope to the Headers "within reason":
That is, if the domain is mostly the same, and the front-part is mostly
the same, consider it "first-class".  For example, I think this could be
considered close enough to say that an email is "first-class":


This might be too permissive for my tastes.  In general I don't like
assuming that a domain name is "close enough" - in my mind it is
either the
same domain or it isn't.

Very strongly agree.


<...>

I would instead do something like:
  SPF (MAIL FROM)
  SPF (Sender:)
  SPF (From:)

consider SPF (Reply-To:)

  Domain(MAIL FROM) = Domain(Sender:) and both PASS:  Second class
  Domain(MAIL FROM) = Domain(From:) and both PASS:  First class

evaluate results of test on Reply-To:

--

Seth Goodman