"@lbutlr" <krem...@kreme.com> writes: > On 1 Feb 2018, at 22:39, Olivier <olivier.nic...@cs.ait.ac.th> wrote: >> A failing connection:AMTP authentication: >> Jan 29 16:44:57 fbsd63 postfix/smtpd[93113]: connect from >> unknown[118.174.201.202] > > >> A successful SMTP authentication >> >> Jan 30 17:52:38 fbsd63 postfix/smtpd[15674]: connect from >> Mac-4.desktops.cs.ait.ac.th[192.41.170.243] > > Is it also possible that the 'unknown' status of the first connection > is part of the problem?
No, we had the same problem when connecting with an IP that has a properly defined rev DNS. Thank you, Olivier --