Possibly multiple PTR records causing issue? dig -x 198.241.168.120 +short mail1.payablesautomation.net. cportal3.visa.com.
On Wed, Aug 14, 2019 at 11:32 AM @lbutlr <krem...@kreme.com> wrote: > 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. > >
