From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <0c594c3988ad3eec9435dddc4dd5093a@plan9.bell-labs.com>
From: presotto@plan9.bell-labs.com
To: 9fans@cse.psu.edu
Subject: Re: [9fans] upas+scanmail question
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Date: Wed, 13 Mar 2002 10:04:54 -0500
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The way bobf did it here was to bind a different rewrite onto
/mail/lib/rewrite into smtp's name space (in /rc/bin/service/tcp25)
that queues everything into a queue for scan mail:

% cat /rc/bin/service.alt/tcp25
#!/bin/rc
#smtp serv net incalldir user

user=`{cat /dev/user}

bind -c /mail/lib/rewrite.in /mail/lib/rewrite
exec upas/smtpd -n $3

% cat /mail/lib/rewrite.in
# reject any address with a % because spammers might try to relay through us using
# it and an internal machine
.*%.*	|	"/mail/lib/haspercent '&' '\s'"

# everything else gets queued for the spam filter
.*	|	"/mail/lib/qmail.in '\s' 'net!achille' '&'"

% cat /mail/lib/qmail.in
#!/bin/rc
sender=$1
shift
addr=$1
shift
/bin/upas/vf | upas/scanmail -s -n /mail/queue mail $sender $addr $* || exit 1
upas/runq /mail/queue /mail/lib/remotemail</dev/null>/dev/null >[2=1]
exit 0
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Subject: [9fans] upas+scanmail question
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Date: Wed, 13 Mar 2002 12:10:31 +0100

Hi,

	I'm trying to use scanmail to filter spam. If I understand it,
/mail/lib/qmail calls scanmail to filter spam and then runq .
But for incomming mail, smtpd calls upas/send, which uses /mail/lib/rewrite to
see what to do. Now, if my mailhost is plan9.escet.urjc.es, rewrite
translates plan9.escet.urjc.es!nemo to local!nemo, and the entry for
local!nemo tells upas/send to add the mail to /mail/box/nemo/mbox, without
using qmail at all.

So, should I use two different queues to put scanmail in the smtpd
received mail pipeline? (queue local mails using scanmail, the run the
queue to deliver all queued mails)

Or is there any obvious way to make upas/send filter the mail through
scanmail and then add the mails passing the filter to the user mail
box? 


thanks in advance

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