I am running SpamAssassin from Courier Maildrop, which is functionally
much the same as Procmail, but (I understand) cleaner as a language and
more powerful.  Then a Maildrop rule finds the messages which are deemed
to be spam and deals with them.

The remainder are sent to Anomy Sanitizer, which does a variety of
things, and "drops" the files which are deemed to be executables, which
are, in my experience, only found in virus emails.  Then Maildrop looks
for messages with a "dropped" file and deals with them.

The remaining messages go to my Inbox.

(In fact, both the spam and virus messages also go to my Inbox, but with
a distinctive subject header, such as "~~~[SPAM]", but they are tagged
for deletion at the next IMAP expunge command.  This way, I see
everything which comes in, but do not have to manually select and deal
with the 30 or so spams and viruses which arrive every day.)

As expected, Spam Assassin (without any external blacklists, signature
comparisons etc.) with the threshold of 5 has a few false positives and
a few false negatives - but I am very happy with it indeed!

Anomy Sanitizer has had no false positives or negatives so far in
respect of "dropping" files.  I am very happy with it.

Both these and the subsequent filtering rules are specified in
Maildrop's ".mailfilter" filtering file.   Maildrop is the local
delivery agent, in this case for Postfix.   So there is no extra
configuration of the MTA beyond what I already had with Maildrop being
the local delivery agent.

All this is documented at:

  http://www.firstpr.com.au/web-mail/Postfix-SA-Anomy-Maildrop/

Thanks for SpamAssassin!!!!!!!

   - Robin


//  Robin Whittle                   http://www.firstpr.com.au
//  Melbourne, Australia            http://fondlyandfirmly.com


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