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Re: [spf-discuss] Re: BLOCK: junkemailfilter.* (fwd)

2007-01-24 22:46:33
On Thu, 25 Jan 2007 00:25:37 -0500 (EST) "Stuart D. Gathman" 
<stuart(_at_)bmsi(_dot_)com> wrote:

The original SES (supported by pysrs) does not work well with grey
listing and sendmail.  The signature changes every time.  (Same with the
rfc2822 flavor of SES.)  On getting a 4xx error, the MTA has to remember
what the MAIL FROM was changed to, so it won't be different when it
retries.  This is difficult or tricky to do in sendmail.  It can't be
handled by the milter interface.  The CF code would have to store the
modified MAIL FROM in the queue file - not a standard procedure.

For those of you that may be thinking about milters and Postfix, IIRC, the 
milter API doesn't support mail from rewriting either.  There's a 
non-milter Sendmail call of some kind you have to do.

Scott K 

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