I have successfully setup Postfix -> Dovecot with virtual users and spam filtering with spamassassin. Now the last remaining part is for the user defined rules. Let me describe my environment and what I am trying to achieve.

I have Postfix setup to call spamc and deliver to Dovecot according to the master.cf line below.

dovecot unix - n n - - pipe flags=DRhu user=vmail:vmail argv=/usr/bin/spamc -u vmail -e /usr/lib/dovecot/deliver -d ${recipient}

The emails get checked by Spamassassin and are delivered to the users's mailbox (/home/vmail/username). I use an actual username (dhav) and not email address (dhaval@example.com). Things are working fine with that.

From reading http://wiki.dovecot.org/LDA/Sieve I see that Sieve can do global and user specified filtering. So I am planning to put the following rule into the global script so spammy emails go to the user's INBOX.spam folder.

require "fileinto"; if header :contains "X-Spam-Flag" "YES" { fileinto "spam"; }

My first question is, where is this global script? Do I configure the "sieve_global_dir = /etc/dovecot/sieve/"? What about he filename?

Most users will not need any additional rules. There are some users that do and I am having a difficult time figuring out how it would be setup. My second question is the following. Is there a way in the global script to check if there is a file called /etc/dovecot/sieve/username or /home/vmail/username/personal_sieve_script and include it?

I was using maildrop before this and procmail before that so I apologies for sounding stupid if this is not how Sieve scripts work.

I am by no means tied the methods I describe above. If anyone knows of a better way to achieve what I am trying to do, I would appreciate if you let me know of it.

Thanks, Dhaval