Bill Verity at "LISTSERV site administrators' forum"
<[log in to unmask]> wrote on 09/13/2006 03:26:14 PM:
> We plan to run Spamassasin on our listserv machine to identify spam
> as soon as we have a faster machine. Question is what to do with it
> after it is identified. Our thought is to simply reject any mail
> that scores "high" from spamassassin. The value of high is yet to be
> determined. This may make spamcop at little happier, but probably
> not enough to keep us off their list.
Define "reject." Return it to the alleged sender? Are you going to
discard the message? Return a permanent SMTP error code?
The last is only possible if you score it while the SMTP connection is
open. The spam filter (based on a sendmail's milter API) I use does the
third option. The first option will get you blacklisted for backscatter
spam. The second choice is the best bet if you can't use #3, but false
positives will get lost.