We recently started using MailScanner with Exim, to get more
options when handling spam and viruses. Up until now, spam
removal has been an opt-in thing, but it just doesn't
work. About 10% of the users have opted in, but the
remaining 90% still complain that spam is a huge problem.
So I figured the next thing to do is set up a system-wide
opt-out solution. MailScanner and SA tag all emails (by
adding extra headers), so I was wondering if the following
is possible:
- Make Exim deliver mails that are tagged as spam into a
Maildir subfolder, i.e ~/Maildir/.spam/.
- ...but only if the file ~/.optout-spam does not exist. If
it does, follow the normal delivery process, i.e. check
for .procmailrc, Exim filter and so on.
Non-spam should be processed in the normal way. Ideally,
Exim should also check for the existence of the spam folder,
and create it if it doesn't exist. But that's not a
requirement, just a bonus if it is possible.
