Learn from spam automatically, fixes #8

dovecot/conf/dovecot.conf

@@ -85,7 +85,7 @@ service auth {
 
 service auth-worker {
   unix_listener auth-worker {
-    user = mail
+    user = dovecot
     group = mail
     mode = 0660
   }
@@ -97,7 +97,7 @@ service auth-worker {
 ###############
 
 protocol imap {
-  mail_plugins = $mail_plugins imap_quota
+  mail_plugins = $mail_plugins imap_quota antispam
 }
 
 service imap-login {
@@ -147,4 +147,12 @@ plugin {
 	sieve_default = /var/lib/dovecot/default.sieve
 	sieve_after = /var/lib/dovecot/after.sieve
   sieve_extdata_dict_uri = proxy::sieve
+
+  antispam_backend = mailtrain
+  antispam_spam = Junk
+  antispam_trash = Trash
+  antispam_mail_sendmail = /usr/bin/rspamc
+  antispam_mail_spam = learn_spam
+  antispam_mail_notspam = learn_ham
+  antispam_mail_sendmail_args = -h;antispam:11334;-P;q1
 }