diff --git a/ChangeLog b/ChangeLog
index 6497a731b..9cacd1411 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -66,6 +66,8 @@ IMPORTANT incompatible changes:
      closes gh-266. hostsdeny supports daemon_list now too.
    * action.d/bsd-ipfw - action option unsed. Change blocktype to port unreach
      instead of deny for consistancy.
+   * filter.d/dovecot - added to support different dovecot failure
+     "..disallowed plaintext auth". Closes Debian bug #709324
    * filter.d/roundcube-auth - timezone offset can be positive or negative
    * action.d/bsd-ipfw - action option unsed. Fixed to blocktype for
      consistency. default to port unreach instead of deny
diff --git a/config/filter.d/dovecot.conf b/config/filter.d/dovecot.conf
index 2caa04b34..a51ce2590 100644
--- a/config/filter.d/dovecot.conf
+++ b/config/filter.d/dovecot.conf
@@ -10,7 +10,7 @@ before = common.conf
 _daemon = (auth|dovecot(-auth)?|auth-worker)
 
 failregex = ^%(__prefix_line)s(pam_unix(\(dovecot:auth\))?:)?\s+authentication failure; logname=\S* uid=\S* euid=\S* tty=dovecot ruser=\S* rhost=<HOST>(\s+user=\S*)?\s*$
-            ^%(__prefix_line)s(pop3|imap)-login: (Info: )?(Aborted login|Disconnected)(: Inactivity)? \(((no auth attempts|auth failed, \d+ attempts)( in \d+ secs)?|tried to use disabled \S+ auth)\):( user=<\S*>,)?( method=\S+,)? rip=<HOST>, lip=(\d{1,3}\.){3}\d{1,3}(, session=<\w+>)?(, TLS( handshaking)?(: Disconnected)?)?\s*$
+            ^%(__prefix_line)s(pop3|imap)-login: (Info: )?(Aborted login|Disconnected)(: Inactivity)? \(((no auth attempts|auth failed, \d+ attempts)( in \d+ secs)?|tried to use (disabled|disallowed) \S+ auth)\):( user=<\S*>,)?( method=\S+,)? rip=<HOST>, lip=(\d{1,3}\.){3}\d{1,3}(, session=<\w+>)?(, TLS( handshaking)?(: Disconnected)?)?\s*$
             ^%(__prefix_line)s(Info|dovecot: auth\(default\)): pam\(\S+,<HOST>\): pam_authenticate\(\) failed: (User not known to the underlying authentication module: \d+ Time\(s\)|Authentication failure \(password mismatch\?\))\s*$
 
 ignoreregex = 
diff --git a/testcases/files/logs/dovecot b/testcases/files/logs/dovecot
index d2aa59ca9..aa79e65ac 100644
--- a/testcases/files/logs/dovecot
+++ b/testcases/files/logs/dovecot
@@ -12,6 +12,9 @@
 # failJSON: { "time": "2004-12-12T11:19:11", "match": true , "host": "190.210.136.21" }
 Dec 12 11:19:11 dunnart dovecot: pop3-login: Aborted login (tried to use disabled plaintext auth): rip=190.210.136.21, lip=113.212.99.193
 
+# failJSON: { "time": "2004-12-12T11:19:11", "match": true , "host": "190.210.136.21" }
+Dec 12 11:19:11 dunnart dovecot: pop3-login: Aborted login (tried to use disallowed plaintext auth): rip=190.210.136.21, lip=113.212.99.193, session=<LgDINsQCkttVIMPg>
+
 # failJSON: { "time": "2005-06-13T16:30:54", "match": true , "host": "49.176.98.87" }
 Jun 13 16:30:54 platypus dovecot: imap-login: Disconnected (auth failed, 2 attempts): user=<username.bob>, method=PLAIN, rip=49.176.98.87, lip=113.212.99.194, TLS
 # failJSON: { "time": "2005-06-14T00:48:21", "match": true , "host": "59.167.242.100" }