Use rspamd as a milter service instead of deprecated rmilter

core/dovecot/conf/dovecot.conf

@@ -155,11 +155,10 @@ plugin {
   # Include the recipient in vacation replies so that DKIM applies
   sieve_vacation_send_from_recipient = yes
 
-  # extract spam score from
-  # X-Spam-Result: .... [<value> / <max_value] ...
-  sieve_spamtest_status_type = score
-  sieve_spamtest_status_header = X-Spamd-Result: .*\[(-?[[:digit:]]+\.[[:digit:]]+) .*\]
-  sieve_spamtest_max_header = X-Spamd-Result: .*\[.* ([[:digit:]]+\.[[:digit:]]+)\]
+  # extract spam score from headers
+  sieve_spamtest_status_type = strlen
+  sieve_spamtest_status_header = X-Spam-Level
+  sieve_spamtest_max_value = 15
 
   # Learn from spam
   imapsieve_mailbox1_name = Junk

core/dovecot/sieve/before.sieve

@@ -19,6 +19,11 @@ if allof (string :is "${extdata.spam_enabled}" "1",
   stop;
 }
 
+if exists "X-Virus" {
+  discard;
+  stop;
+}
+
 if string :is "${extdata.reply_enabled}" "1" {
   vacation :days 1 :subject "${extdata.reply_subject}" "${extdata.reply_body}";
 }

core/postfix/conf/main.cf

@@ -93,7 +93,7 @@ smtpd_recipient_restrictions =
 # Milter
 ###############
 
-smtpd_milters = inet:milter:9900
+smtpd_milters = inet:antispam:9900
 milter_protocol = 6
 milter_mail_macros = i {mail_addr} {client_addr} {client_name} {auth_authen}
 milter_default_action = tempfail