Configure dovecot's antispam filter.

Mails to be retrained are stored in the spooldir /home/mail/spamspool;
later a daemon catches them up and feed them to sa-learn(1p). (On busy
systems batch-process the learning should be much more efficient.)

The folder transisition matrix along with the corresponding actions can
be found there:

  http://hg.dovecot.org/dovecot-antispam-plugin/raw-file/5ebc6aae4d7c/doc/dovecot-antispam.7.txt

See also dovecot-antispam(7).

1 files changed, 21 insertions, 0 deletions

diff --git a/roles/IMAP/files/etc/dovecot/conf.d/90-plugin.conf b/roles/IMAP/files/etc/dovecot/conf.d/90-plugin.conf
new file mode 100644
index 0000000..6e60f0f
--- /dev/null
+++ b/roles/IMAP/files/etc/dovecot/conf.d/90-plugin.conf
@@ -0,0 +1,21 @@
+##
+## Plugin settings
+##
+
+# All wanted plugins must be listed in mail_plugins setting before any of the
+# settings take effect. See <doc/wiki/Plugins.txt> for list of plugins and
+# their configuration. Note that %variable expansion is done for all values.
+
+plugin {
+  antispam_backend = spool2dir
+
+  antispam_trash = TRASH
+  antispam_unsure_pattern_ignorecase = MailTrain;MailTrain/*
+  antispam_spam = SPAM
+
+  # The first %%lu is replaced by the current time.
+  # The second %%lu is replaced by a counter to generate unique names.
+  # These two tokens MUST be present in the template!
+  antispam_spool2dir_spam    = /home/mail/spamspool/%u-%%10lu-%%06lu.spam
+  antispam_spool2dir_notspam = /home/mail/spamspool/%u-%%10lu-%%06lu.ham
+}