Rick Hazey:
> Thanks for the insight. The warning "greeted me with my own hostname"
> appears in the log file when delivery of the bounce is attempted.
> Sounds like a bad assumption on my part: I assumed since it was
> labeled a warning it wasn't fatal but a notification.
>
> Both SMTP servers do have the same hostname. This was intentional
> since incoming (via Kerio) and outgoing (via Postfix) are on the
> same IP and my goal was for the hostname to match forward and
> reverse DNS.
>
> Is there no workaround? Or is my configuration flawed and to be avoided?
As a matter of sanity, Postfix requires that each MTA has a different
name (whether those MTAs are on the same box or not). Also, when
Postfix is not primary MX for a domain, Postfix requires that the
primary MX host's IP address is removed from its inet_interfaces
setting. By default, inet_interfaces comprises all IP addresses
on the box.
These sanity checks help Postfix to avoid mail server meltdown and
email explosion problems due to configuration error. If you don't
want this level of safety, you're welcome to use a different MTA.
Wietse
