Dovecot Antispam Configuration + Testing script

90-antispam.conf

plugin {

	# Dovecot Antispam-Plugin configuration for sa-learn

	# Names for mailboxes that should not be confused
	# i.e. only operate on mail moved in and out of the spam folder
	antispam_trash = Trash,"Deleted Messages"
	antispam_spam = Junk;Spam;SPAM

	# The mailtrain backend basically is a fork and execv of the
	# executable and arguments provided below.
	# Hence, the executable runs as the dovecot user, e.g. vmail
	antispam_backend = mailtrain
	antispam_mail_sendmail = /path/to/mailtrain.py
	antispam_mail_spam = --spam
	antispam_mail_notspam = --ham
	antispam_mail_sendmail_args =

	# RTFM
	# By appends we mean the case of mail moving when the  source  folder  is
	# unknown,  e.g. when you move from some other account or with tools like
	#offlineimap
	antispam_allow_append_to_spam = no

}

mailtrain.py

#!/usr/local/bin/python2.7

import sys
import email

with open("/var/log/mailtrain.log", "a") as log:

	lines = sys.stdin.readlines()

	parser = email.FeedParser.FeedParser()
	msg = None
	for msg_line in lines:
		   parser.feed(msg_line)

	msg = parser.close()

	log.write("%s from %s [%s]" % (str(sys.argv), msg.get("From"), msg.get("Message-ID"))