# per https://github.com/fail2ban/fail2ban/issues/125
# and https://github.com/fail2ban/fail2ban/issues/126
# failJSON: { "time": "2005-02-21T09:21:54", "match": true , "host": "192.0.43.10" }
Feb 21 09:21:54 xxx postfix/smtpd[14398]: NOQUEUE: reject: RCPT from example.com[192.0.43.10]: 450 4.7.1 : Helo command rejected: Host not found; from=<> to=<> proto=ESMTP helo=
# failJSON: { "time": "2005-07-12T07:47:48", "match": true , "host": "1.2.3.4" }
Jul 12 07:47:48 saturn postfix/smtpd[8738]: NOQUEUE: reject: RCPT from 1-2-3-4-example.com[1.2.3.4]: 554 5.7.1 <smtp@example.com>: Relay access denied; from=<john@example.com> to=<smtp@example.org> proto=SMTP helo=<198.51.100.17>