diff --git a/config/filter.d/exim-common.conf b/config/filter.d/exim-common.conf
index 4d622b7b2f..0f8c91ff64 100644
--- a/config/filter.d/exim-common.conf
+++ b/config/filter.d/exim-common.conf
@@ -11,7 +11,7 @@ after = exim-common.local
 
 _fields_grp = (?: (?!H=)[A-Za-z]{1,4}(?:=\S+)?)*
 host_info = %(_fields_grp)s (?:H=)?(?:[\w.-]+)? ?(?:\(\S+\))? ?\[<ADDR>\](?::\d+)?%(_fields_grp)s
-pid = (?: \[\d+\]| \w+ exim\[\d+\]:)?
+pid = (?: \[\d+\]| [\w\.-]+ exim\[\d+\]:)?
 
 
 # DEV Notes
diff --git a/fail2ban/tests/files/logs/exim b/fail2ban/tests/files/logs/exim
index da7e2bc663..c66a0f9867 100644
--- a/fail2ban/tests/files/logs/exim
+++ b/fail2ban/tests/files/logs/exim
@@ -47,8 +47,8 @@
 # failJSON: { "time": "2014-01-12T02:07:48", "match": true , "host": "85.214.85.40" }
 2014-01-12 02:07:48 dovecot_login authenticator failed for h1832461.stratoserver.net (User) [85.214.85.40]: 535 Incorrect authentication data (set_id=scanner)
 
-# failJSON: { "time": "2019-10-22T03:39:17", "match": true , "host": "192.0.2.37", "desc": "pid-prefix in form of 'mx1 exim[...]:', gh-2553" }
-2019-10-22 03:39:17 mx1 exim[29786]: dovecot_login authenticator failed for (User) [192.0.2.37]: 535 Incorrect authentication data (set_id=test@domain.com)
+# failJSON: { "time": "2019-10-22T03:39:17", "match": true , "host": "192.0.2.37", "desc": "pid-prefix in form of 'hostname exim[...]:', gh-2553" }
+2019-10-22 03:39:17 mx1.fqdn.local exim[29786]: dovecot_login authenticator failed for (User) [192.0.2.37]: 535 Incorrect authentication data (set_id=test@domain.com)
 
 # failJSON: { "time": "2014-12-02T03:00:23", "match": true , "host": "193.254.202.35" }
 2014-12-02 03:00:23 auth_plain authenticator failed for (rom182) [193.254.202.35]:41556 I=[10.0.0.1]:25: 535 Incorrect authentication data (set_id=webmaster)