diff --git a/config/filter.d/dovecot.conf b/config/filter.d/dovecot.conf
index fc649d3a..4df7c752 100644
--- a/config/filter.d/dovecot.conf
+++ b/config/filter.d/dovecot.conf
@@ -8,17 +8,17 @@ before = common.conf
 [Definition]
 
 _auth_worker = (?:dovecot: )?auth(?:-worker)?
-_daemon = (dovecot(-auth)?|auth)
+_daemon = (?:dovecot(?:-auth)?|auth)
 
-prefregex = ^%(__prefix_line)s(%(_auth_worker)s(?:\([^\)]+\))?: )?(?:%(__pam_auth)s(?:\(dovecot:auth\))?: |(?:pop3|imap)-login: )?(?:Info: )?<F-CONTENT>.+</F-CONTENT>$
+prefregex = ^%(__prefix_line)s(?:%(_auth_worker)s(?:\([^\)]+\))?: )?(?:%(__pam_auth)s(?:\(dovecot:auth\))?: |(?:pop3|imap)-login: )?(?:Info: )?<F-CONTENT>.+</F-CONTENT>$
 
 failregex = ^authentication failure; logname=\S* uid=\S* euid=\S* tty=dovecot ruser=\S* rhost=<HOST>(?:\s+user=\S*)?\s*$
-            ^(?:Aborted login|Disconnected)(?::(?: [^ \(]+)+)? \((?:auth failed, \d+ attempts(?: in \d+ secs)?|tried to use (disabled|disallowed) \S+ auth)\):( user=<[^>]*>,)?( method=\S+,)? rip=<HOST>(?:[^>]*(?:, session=<\S+>)?)\s*$
-            ^pam\(\S+,<HOST>\): pam_authenticate\(\) failed: (User not known to the underlying authentication module: \d+ Time\(s\)|Authentication failure \(password mismatch\?\))\s*$
+            ^(?:Aborted login|Disconnected)(?::(?: [^ \(]+)+)? \((?:auth failed, \d+ attempts(?: in \d+ secs)?|tried to use (?:disabled|disallowed) \S+ auth)\):(?: user=<[^>]*>,)?(?: method=\S+,)? rip=<HOST>(?:[^>]*(?:, session=<\S+>)?)\s*$
+            ^pam\(\S+,<HOST>\): pam_authenticate\(\) failed: (?:User not known to the underlying authentication module: \d+ Time\(s\)|Authentication failure \(password mismatch\?\))\s*$
             ^[a-z\-]{3,15}\(\S*,<HOST>(?:,\S*)?\): (?:unknown user|invalid credentials)\s*$
             <mdre-<mode>>
 
-mdre-aggressive = ^(?:Aborted login|Disconnected)(?::(?: [^ \(]+)+)? \((?:no auth attempts|disconnected before auth was ready,|client didn't finish \S+ auth,)(?: (?:in|waited) \d+ secs)?\):( user=<[^>]*>,)?( method=\S+,)? rip=<HOST>(?:[^>]*(?:, session=<\S+>)?)\s*$
+mdre-aggressive = ^(?:Aborted login|Disconnected)(?::(?: [^ \(]+)+)? \((?:no auth attempts|disconnected before auth was ready,|client didn't finish \S+ auth,)(?: (?:in|waited) \d+ secs)?\):(?: user=<[^>]*>,)?(?: method=\S+,)? rip=<HOST>(?:[^>]*(?:, session=<\S+>)?)\s*$
 
 mdre-normal =