On Fri, Jul 16, 2021 at 02:30:43PM -0400, Thirumurugan Kalapatti wrote: > Jul 16 12:23:30 hostM postfix/smtp[698664]: 7A2A020ECDC6: to=<joe@hostb>, > relay=none, delay=0.05, delays=0.02/0.03/0/0, dsn=5.4.4, status=bounced > (Host or domain name not found. Name service error for name=hostb type=A: > Host not found)
This means that: * "hostb" is not listed in the file. (left-justified, one hostname, just the name, per line) > mail server hostM says cannot find hostb. I would expect the mail > server hostM to accept mail for hostb since it is part of the > mydestination variable. The message *was* accepted, the issue is that "hostb" is not resolving to the "local" transport (and has no known IP address for SMTP delivery, which you want to avoid anyway). -- Viktor.