:-) My postfix configuration is quite complex with a lot of special cases and rules. However I'd like to make an anti-spam configuration as simple and lightweight as possible (KISS).
/etc/postfix/master.cf
smtp inet n - n - - smtpd -o content_filter=spamassassin
spamassassin unix - n n - - pipe user=nobody argv=/usr/bin/vendor_perl/spamc -e /usr/sbin/sendmail -oi -f ${sender} ${recipient}
then the simplest sieve rule I can think of:
require "fileinto"; if header :contains "X-Spam-Flag" "YES" { fileinto "Spam"; }
I'd like to make this rule active for only local deliveries via dovecot LMTP with sieve plugin and setting postfix `mailbox_transport' to dovecot LMTP.
I believe it is so simple it should work (am I wrong?). But... It would be more convenient to do some tests before applying changes to a production environment config. The problem is: I have no separate testing environment with my strange configuration I'm able to test a spamassassin score for an e-mail manually. How about dovecot LMTP? Can I test local mail delivery by dovecot LMTP manually? I mean: to simulate "I'm the Postfix" and produce for some testing e-mail the same effect as postfix granting it via `local_transport' to dovecot?
Best regards, Marek