filter.d/exim.conf: added new reason for "rejected RCPT" regex: Unrouteable address

config/filter.d/exim.conf

@@ -15,7 +15,7 @@ before = exim-common.conf
 
 failregex = ^%(pid)s %(host_info)ssender verify fail for <\S+>: (?:Unknown user|Unrouteable address|all relevant MX records point to non-existent hosts)\s*$
             ^%(pid)s \w+ authenticator failed for (?:[^\[\( ]* )?(?:\(\S*\) )?\[<HOST>\](?::\d+)?(?: I=\[\S+\](:\d+)?)?: 535 Incorrect authentication data( \(set_id=.*\)|: \d+ Time\(s\))?\s*$
-            ^%(pid)s %(host_info)srejected RCPT [^@]+@\S+: (?:relay not permitted|Sender verify failed|Unknown user)\s*$
+            ^%(pid)s %(host_info)srejected RCPT [^@]+@\S+: (?:relay not permitted|Sender verify failed|Unknown user|Unrouteable address)\s*$
             ^%(pid)s SMTP protocol synchronization error \([^)]*\): rejected (?:connection from|"\S+") %(host_info)s(?:next )?input=".*"\s*$
             ^%(pid)s SMTP call from \S+ %(host_info)sdropped: too many nonmail commands \(last was "\S+"\)\s*$
             ^%(pid)s SMTP protocol error in "AUTH \S*(?: \S*)?" %(host_info)sAUTH command used when not advertised\s*$

fail2ban/tests/files/logs/exim

@@ -72,3 +72,5 @@
 
 # failJSON: { "time": "2017-04-23T22:45:59", "match": true , "host": "192.0.2.2", "desc": "optional part (...)" }
 2017-04-23 22:45:59 fixed_login authenticator failed for bad.host.example.com [192.0.2.2]:54412 I=[172.89.0.6]:587: 535 Incorrect authentication data (set_id=user@example.com)
+# failJSON: { "time": "2017-05-01T07:42:42", "match": true , "host": "192.0.2.3", "desc": "rejected RCPT - Unrouteable address" }
+2017-05-01 07:42:42 H=some.rev.dns.if.found (the.connector.reports.this.name) [192.0.2.3] F=<some.name@some.domain> rejected RCPT <some.invalid.name@a.domain>: Unrouteable address