Am 22.12.2013 00:56, schrieb Benny Pedersen: > Hans Krueger skrev den 2013-12-21 22:58: >> registered Linux user 289023 > > if you DNAT port 25, then you must tell postfix is works behind NAT > > man 5 postconf > > proxy_interfaces (default: empty) > The network interface addresses that this mail system receives mail on > by way of a proxy or network address translation unit. > > This feature is available in Postfix 2.0 and later. > > You must specify your "outside" proxy/NAT addresses when your system is > a backup MX host for other domains, otherwise mail delivery loops will > happen when the primary MX host is down. > > Example: > proxy_interfaces = 1.2.3.4
this is completly off-topic and not relevant because he can't connect and so is far away from mail loops 1 out of 1000 NAT setups needs to touch this above at all because "when your system is a backup MX host" is not that often used these days for most setups
