Reindl Harald:
> > Assuming that the Postfix machine is behind a NAT of some kind:
> >
> > myhostname: use the name of the internal IP address
> > smtpd_banner: use the name of external IP address
> > smtp_helo_name: use the name of external IP address
> >
> > Don't listen to people who say use myhostname in smtpd_banner
>
> :-)
>
> i would use the same hostname in fornt of and behind the NAT
> because normally in the LAN behind the nat a name-server is
> running, so there is no difference NAT/Public
My configuration supports multiple inside Postfix servers. Each
uses its own unique internal name in myhostname, while they all
share the same external name in smtpd_banner and smtp_helo_name.
There is a patch lying around somewhere that allows an SMTP server
behind nat/balancer to log its own myhostname in the end-of-data
reply. This would simplify logfile searches, but has lost some
urgency with the introduction of non-repeating queue IDs.
Wietse
