Removed the -no auth attempts- from the triggers because of lots of FP

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)? \(((no auth attempts|auth failed, \d+ attempts)( in \d+ secs)?|tried to use (disabled|disallowed) \S+ auth)\):( user=<\S*>,)?( method=\S+,)? rip=<HOST>, lip=(\d{1,3}\.){3}\d{1,3}(, TLS( handshaking)?(: Disconnected)?)?(, session=<\S+>)?\s*$
+            ^%(__prefix_line)s(pop3|imap)-login: (Info: )?(Aborted login|Disconnected)(: Inactivity)? \(((auth failed, \d+ attempts)?|tried to use (disabled|disallowed) \S+ auth)\):( user=<\S*>,)?( method=\S+,)? rip=<HOST>, lip=(\d{1,3}\.){3}\d{1,3}(, TLS( handshaking)?(: Disconnected)?)?(, session=<\S+>)?\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 = 
@@ -18,6 +18,8 @@ ignoreregex =
 # DEV Notes:
 # * the first regex is essentially a copy of pam-generic.conf
 # * Probably doesn't do dovecot sql/ldap backends properly
+# * Removed the 'no auth attempts' log lines from the matches because produces
+#    lots of false positives on misconfigured MTAs making regexp unuseable
 #
 # Author: Martin Waschbuesch
 #         Daniel Black (rewrote with begin and end anchors)

testcases/files/logs/dovecot

@@ -19,19 +19,11 @@ Dec 12 11:19:11 dunnart dovecot: pop3-login: Aborted login (tried to use disallo
 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" }
 Jun 14 00:48:21 platypus dovecot: imap-login: Disconnected (auth failed, 1 attempts): method=PLAIN, rip=59.167.242.100, lip=113.212.99.194, TLS: Disconnected
-# failJSON: { "time": "2005-06-13T20:48:11", "match": true , "host": "121.44.24.254" }
-Jun 13 20:48:11 platypus dovecot: pop3-login: Disconnected (no auth attempts): rip=121.44.24.254, lip=113.212.99.194, TLS: Disconnected
-# failJSON: { "time": "2005-06-13T21:48:06", "match": true , "host": "180.200.180.81" }
-Jun 13 21:48:06 platypus dovecot: pop3-login: Disconnected: Inactivity (no auth attempts): rip=180.200.180.81, lip=113.212.99.194, TLS
-# failJSON: { "time": "2005-06-13T20:20:21", "match": true , "host": "180.189.168.166" }
-Jun 13 20:20:21 platypus dovecot: imap-login: Disconnected (no auth attempts): rip=180.189.168.166, lip=113.212.99.194, TLS handshaking: Disconnected
 # failJSON: { "time": "2005-06-23T00:52:43", "match": true , "host": "193.95.245.163" }
 Jun 23 00:52:43 vhost1-ua dovecot: pop3-login: Disconnected: Inactivity (auth failed, 1 attempts): user=<info>, method=PLAIN, rip=193.95.245.163, lip=176.214.13.210
 
 # failJSON: { "time": "2005-07-02T13:49:31", "match": true , "host": "192.51.100.13" }
 Jul 02 13:49:31 hostname dovecot[442]: pop3-login: Aborted login (auth failed, 1 attempts in 17 secs): user=<test>, method=PLAIN, rip=192.51.100.13, lip=203.0.113.17, session=<YADINsQCDs5BH8Pg>
-# failJSON: { "time": "2005-07-02T13:49:32", "match": true , "host": "192.51.100.13" }
-Jul 02 13:49:32 hostname dovecot[442]: pop3-login: Disconnected (no auth attempts in 58 secs): user=<>, rip=192.51.100.13, lip=203.0.113.17, session=<LgDINsQCkttVIMPg>
 
 # failJSON: { "time": "2005-07-02T13:49:32", "match": true , "host": "200.76.17.206" }
 Jul 02 13:49:32 hostname dovecot[442]: dovecot: auth(default): pam(account@MYSERVERNAME.com,200.76.17.206): pam_authenticate() failed: User not known to the underlying authentication module: 2 Time(s)