On Thu, 23 May 2002, Marc G. Fournier wrote:
> Nope, this doesn't work ...
...in all situations.
> try sending yourself a CC'd mail message, and you'll see what I mean
> ... I sent an email to a friend on my server, CC'd it to myself, from
> a remote server, and here is the result that I've received:
[...]
> Notice the 'required=5.1'? My required is the default 5.0 ... I've
> never changed from what was installed, but she has ...
>
> This, again, will only work properly if there is only one recipient :(
Apparently so, at least if you vary configuration between individuals.
If it matters to you, Postfix is passing in the recipient address
details for all the addresses on the command line. My setup only
extracts the first one and uses that.
If you want to get the filtering per-individual correct, dump the first
"user" argument entirely, then use the script to iterate through the
recipient addresses and call SA for each of them.
Something like:
spam unix - n n - - pipe
flags=Rq user=mailfilter argv=/home/mailfilter/spam-filter \
'${sender}' -- ${recipient}
---------- cut here ----------
#!/bin/bash
#
# Process mail through SpamAssassin, adding the results, then feed it back into
# the PostFix process.
sender=$1; shift
for recipient in $@; do
user=${recipient}
user=${user#+}
user=${user#-}
user=${user#@}
{ spamc -u "${user}" | /usr/sbin/sendmail -i -f "${sender}" \
"${recipient}" } || exit 75
done
exit 0
---------- cut here ----------
I didn't test that script, though, so some assembly may be required. The
principal should be clear enough, though.
Watch out for the increase in system load that comes from scanning each
mail for each recipient and for forking the delivery process for each of
them.
This will also stop things like Cyrus doing the hardlink "multiple
recipients" optimization, should you care about that.
If you want this to work at an ISP scale, rewrite the spamd backend to
deliver to your MTA via LMTP, not a forked sendmail, after the scanning
is done. If you care, of course.
Daniel
--
If you feel you have both feet planted on level ground,
then the university has failed you.
-- Robert F. Goheen
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