Amavisd-new has a feature that you can enable viz:
if SPAM then transform [EMAIL PROTECTED] -> [EMAIL PROTECTED]
Then your delivery agent can refile it on the fly.
Alternatively, you can do this yourself by either hacking the
maildeliver or placing a script in the pipeline (or by writing
your own delivery agent, which is what I do) to make the same
transform as amavisd-new.
If I hadn't already written a new delivery agent, I would have
been eager to use the amavisd-new wrapper. I think I still will,
but the pressure is not so high.
Unfortunately for all of us, spamc doesn't fully implement the
spamassassin command line. Plain spamassassin is too slow to
start for more than a few hundreds of emails per day, so spamc
is necessary. However, spamc doesn't have the 'exit-code' option
which makes it trivial to script up the re-write.
I had the following coded up in the ksh (Lots of error-checking
and mua feature support hacks removed):
domain=$3 #From command line
recip=$4 #From command line
DOMAIN=$( match_domain $domain )
RECIP=$( match_recip $recip )
# drop message on stdin into temp file
if spamassassin -e > $tmpfile
then
RECIP=$( fixup_recip "+spam" $RECIP )
fi
RecipDir=${POPSTOREPATH}/$DOMAIN/$RECIP
deliver $RecipDir < $tmpfile
To do that with spamc:
# drop message on stdin into temp file
spamc -e > $tmpfile
if egrep -s 'X-spam-flag: YES' $tmpfile
then
RECIP=$( fixup_recip "+spam" $RECIP )
fi
For us, it's a stylistic matter at present. spamc+egrep -s is still
between 10 and 100 times faster than plain spamassassin.
Note that I don't re-write the recip addr in the message, I just refile it.
I'm certain that with nawk or a judicious use of egrep and sed that one
could rewrite the recipient in the message on the fly, and then deliver
normally, viz:
| /usr/bin/spamassassin -P | fixup_to_if_spam | /usr/bin/maildir
Cheers!
-sam
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