Replacing antispam plugin with IMAPSieve ======================================== Contents 1. Replacing antispam plugin with IMAPSieve 1. Caveats and possible pitfalls 2. Dovecot configuration 3. Sieve scripts 4. Shell scripts 1. For spamassassin 2. For rspamd 5. Debugging 6. RoundCube You will need at least pigeonhole v0.4.14 for this. If you have already configured sieve, please adjust the following to match your setup. Caveats and possible pitfalls ----------------------------- * INBOX name is case-sensitive * [Pigeonhole.Sieve.Plugins.IMAPSieve.txt] will *only* apply to IMAP. It *will not* apply to LDA or LMTP. Use [Pigeonhole.Sieve.txt] normally for LDA/LMTP. * With this configuration, moving mails will slow down due to learn being done per email. If you want to avoid this, you need to think of something else. Probably piping things into a FIFO or perhaps using a socket based worker might work better. * Please read and to understand sieve configuration better. * Please read for more information about sieve extensions. * If you run Spamassassin trough Amavis and you use a virtual users setup, you should instead configure Spamassassin to use MySQL/PostgreSQL as a backend, unless you want a headache with file permissions and lock files. You can find instructions here [http://www.iredmail.org/docs/store.spamassassin.bayes.in.sql.html]. In this case, the '-u' parameter passed to 'sa-learn' (and the relevant sieve variables) is obsolete and can be safely removed. Changes: * 2017/05/05 - Recommendation about Virtual Users and using an SQL Backend. Added brief info about . * 2017/04/01 - Pass imap user to scripts. * 2017/03/19 - Added rspamd scripts and mention about sieve plugins. * 2017/02/13 - Improved documentation and added instructions for Spam->Trash. (Thanks for everyone who commented on mailing list) * 2017/02/10 - Removed imap_stats (it's not needed). Dovecot configuration --------------------- ---%<------------------------------------------------------------------------- protocol imap { mail_plugins = $mail_plugins imap_sieve } plugin { sieve_plugins = sieve_imapsieve sieve_extprograms # From elsewhere to Spam folder imapsieve_mailbox1_name = Spam imapsieve_mailbox1_causes = COPY imapsieve_mailbox1_before = file:/usr/lib/dovecot/sieve/report-spam.sieve # From Spam folder to elsewhere imapsieve_mailbox2_name = * imapsieve_mailbox2_from = Spam imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_before = file:/usr/lib/dovecot/sieve/report-ham.sieve sieve_pipe_bin_dir = /usr/lib/dovecot/sieve sieve_global_extensions = +vnd.dovecot.pipe } ---%<------------------------------------------------------------------------- Sieve scripts ------------- Create directory /usr/lib/dovecot/sieve and put following files to that: report-spam.sieve ---%<------------------------------------------------------------------------- require ["vnd.dovecot.pipe", "copy", "imapsieve", "environment", "variables"]; if environment :matches "imap.user" "*" { set "username" "${1}"; } pipe :copy "sa-learn-spam.sh" [ "${username}" ]; ---%<------------------------------------------------------------------------- report-ham.sieve ---%<------------------------------------------------------------------------- require ["vnd.dovecot.pipe", "copy", "imapsieve", "environment", "variables"]; if environment :matches "imap.mailbox" "*" { set "mailbox" "${1}"; } if string "${mailbox}" "Trash" { stop; } if environment :matches "imap.user" "*" { set "username" "${1}"; } pipe :copy "sa-learn-ham.sh" [ "${username}" ]; ---%<------------------------------------------------------------------------- Shell scripts ------------- For spamassassin ---------------- sa-learn-spam.sh ---%<------------------------------------------------------------------------- exec /usr/bin/sa-learn -u ${1} --spam ---%<------------------------------------------------------------------------- sa-learn-ham.sh ---%<------------------------------------------------------------------------- exec /usr/bin/sa-learn -u ${1} --ham ---%<------------------------------------------------------------------------- For rspamd ---------- By default, rspamd does global learning. If you want per-user classification, or something more complex, see https://rspamd.com/doc/configuration/statistic.html sa-learn-spam.sh ---%<------------------------------------------------------------------------- exec /usr/bin/rspamc -h /run/rspamd/worker-controller.socket -P learn_spam ---%<------------------------------------------------------------------------- sa-learn-ham.sh ---%<------------------------------------------------------------------------- exec /usr/bin/rspamc -h /run/rspamd/worker-controller.socket -P learn_ham ---%<------------------------------------------------------------------------- Before running following commands, make sure dovecot.conf has all the sieve configuration you want. Then run following commands: ---%<------------------------------------------------------------------------- sievec /usr/lib/dovecot/sieve/report-spam.sieve sievec /usr/lib/dovecot/sieve/report-ham.sieve chmod +x /usr/lib/dovecot/sieve/sa-learn-ham.sh /usr/lib/dovecot/sieve/sa-learn-spam.sh ---%<------------------------------------------------------------------------- Now your learn scripts should be invoked when you move mails between folders. Debugging --------- To debug, you need to import "vnd.dovecot.debug" extension. Then you can put, when required ---%<------------------------------------------------------------------------- debug_log "something" ---%<------------------------------------------------------------------------- variables are supported in this. RoundCube --------- Recent versions of RoundCube [https://roundcube.net/] include a plugin (located in 'plugins/markasjunk') for allowing users to mark Spam/Ham in a convenient way. Please make sure the Junk/Spam folder matches your configuration. (This file was created from the wiki on 2017-10-10 04:42)