esmtp header filter

Ive seen a few filters posted in the past few days/weeks.

I wanted to know people's thoughts on the junk following the word
ESMTP  (an example immediately below; headers at bottom):

     by concept.temple.edu with esmtp (Z*LPM=1R> 7P1(_at_)E)


By thoughts: has anyone written a filter, think it's worth filtering,
too many false-pos, potential problems, etc.


I just wrote this one and currently testing it .... so far so good.


# ------------------------------------------------------------------
POTENTIAL="${MAILDIR}/SPAM/Potential"

# 2006-Nov-20  esmtp should be a IP or hostname ... I think.
:0
* esmtp.*\([^a-zA-Z0-9\.]+\)
{
        LOG="[${PID}] ${TenSPACES}SPAM in Headers (2) deleted ${NL}"
        :0:
        $POTENTIAL
}

# ------------------------------------------------------------------



 Thanks
 Birl



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(indented by me)

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