> On May 6, 2018, at 5:19 AM, Proxy <proxy-...@mail.ru> wrote: > > > I set reject_unknown_reverse_client_hostname and will see how that goes.
Unlikely to make a difference in this case: May 4 04:02:03 AAAAA postfix/smtpd[15310]: warning: hostname triband-del-59.178.65.172.bol.net.in does not resolve to address 59.178.65.172: Name or service not known The host has a reverse address -> name mapping, that name does not match any forward address. -- Viktor.