Aug 14 09:25:41 mail postfix/smtpd[44179]: NOQUEUE: reject: RCPT from
unknown[198.241.168.120]: 550 5.7.25 Client host rejected: cannot find your
hostname, [198.241.168.120]; from=<*munged*@*mybak*> to=<lbut...@covisp.net>
proto=ESMTP helo=<cportal3.visa.com>
👹 root@mail # dig cportal3.visa.com +short
[9:27] [/var/log]
198.241.168.120
The help doesn’t match the from, but it is valid.
And yes, this is a BANK, sigh.
smtpd_helo_restrictions = reject_invalid_helo_hostname,
reject_non_fqdn_helo_hostname, check_helo_access
pcre:/etc/postfix/helo_checks.pcre permit
--
Nihil est--in vita priore ego imperator Romanus fui.
