From 44601962cab569b08b0dfd1247923639427af936 Mon Sep 17 00:00:00 2001
From: Alex <caskd@420blaze.it>
Date: Fri, 21 Aug 2020 10:29:48 +0200
Subject: [PATCH] Better sieve filters and lmtp support, auto nuke trash

---
 templates/default.sieve.j2 | 11 ++++--
 templates/dovecot.conf.j2  | 77 +++++++++++++++++++++++++++++---------
 2 files changed, 68 insertions(+), 20 deletions(-)

diff --git a/templates/default.sieve.j2 b/templates/default.sieve.j2
index 5818861..4802083 100644
--- a/templates/default.sieve.j2
+++ b/templates/default.sieve.j2
@@ -1,5 +1,10 @@
-require ["fileinto", "mailbox"];
-if header :contains "X-Spam-Flag" "YES"
+require ["fileinto","mailbox"];
+if anyof(
+	header :contains ["X-Spam-Flag"] "YES",
+	header :contains ["X-Spam-Status"] "spam",
+	header :contains ["X-Spam"] "Yes",
+	header :contains ["Subject"] "*** SPAM ***"
+	)
 {
-	fileinto "Junk";
+	fileinto :create "Junk";
 }
diff --git a/templates/dovecot.conf.j2 b/templates/dovecot.conf.j2
index 029c364..6effc67 100644
--- a/templates/dovecot.conf.j2
+++ b/templates/dovecot.conf.j2
@@ -101,6 +101,8 @@ dict {
 # it's not found:
 !include_try local.conf
 
+protocols = imap lmtp
+
 ssl = required
 ssl_cert = </etc/ssl/private/mail/fullchain.pem
 ssl_key = </etc/ssl/private/mail/privkey.pem
@@ -118,7 +120,6 @@ passdb {
 	driver = pam
 }
 
-
 service imap-login {
 	inet_listener imap {
 		#address = none
@@ -131,6 +132,22 @@ service imap-login {
 	}
 }
 
+service auth {
+	unix_listener /var/spool/postfix/private/auth {
+		mode = 0660
+		user = postfix
+		group = postfix
+	}
+	user = root
+}
+service lmtp {
+	unix_listener /var/spool/postfix/private/dovecot-lmtp {
+		mode = 0600
+		group = postfix
+		user = postfix
+	}
+}
+
 mail_location = maildir:~/Mail:INBOX=~/Mail/Inbox:LAYOUT=fs
 namespace inbox {
 	inbox = yes
@@ -149,30 +166,56 @@ namespace inbox {
 	}
 	mailbox Trash {
 		special_use = \Trash
+		autoexpunge = 7d
 	}
 	mailbox Archive {
 		special_use = \Archive
+		auto = subscribe
 	}
 }
 
-service auth {
-	unix_listener /var/spool/postfix/private/auth {
-		mode = 0660
-		user = postfix
-		group = postfix
-	}
-	user = root
-}
-
-protocol lda {
-	mail_plugins = $mail_plugins sieve
-}
 protocol lmtp {
 	mail_plugins = $mail_plugins sieve
 }
+
 plugin {
-	sieve = ~/.dovecot.sieve
-	sieve_default = /var/lib/dovecot/sieve/default.sieve
-	sieve_dir = ~/.sieve
-	sieve_global_dir = /var/lib/dovecot/sieve/
+	sieve_plugins = sieve_extprograms
+	sieve_extensions = +editheader +mboxmetadata +servermetadata +imapflags +notify +spamtest +spamtestplus +virustest
+
+	##
+	# rspamd:
+	#
+	# X-Spamd-Result: default: False [0.00 / 150.00]; ...
+	# X-Spam: Yes
+
+	##
+	# rspamd score based
+	#
+	# WARNING: the max score provided by rspamd is the maximum score
+	# rspamd cares about, e.g. the score required for reject, not
+	# necessarily the one for add_header, and therefore not a good
+	# baseline for what should be considered "100%" spam.
+	#
+	##
+	sieve_spamtest_status_type = score
+	sieve_spamtest_status_header = X-Spamd-Result: .*? \[([[:digit:]]+\.[[:digit:]]+) / [[:digit:]]+\.[[:digit:]]+\];
+	### best to use the same value as for `add_header` in rspamd
+	sieve_spamtest_max_value = 6
+	### can read the "max score" from rspamd, but see warning above
+	## sieve_spamtest_max_header = X-Spamd-Result: .*? \[[[:digit:]]+\.[[:digit:]]+ / ([[:digit:]]+\.[[:digit:]]+)\];
+
+	##
+	# Yes/No based
+	#
+	##
+	# sieve_spamtest_status_type = text
+	# sieve_spamtest_status_header = X-Spam
+	# sieve_spamtest_text_value1 = No
+	# sieve_spamtest_text_value10 = Yes
+
+	#
+	# Automatically filter spam into the spam folder
+	#
+	sieve_before = /usr/lib/dovecot/sieve/default.sieve
 }
+