Feizhou wrote:
Look at the relaydomains and the transports tables from postfix. Make sure that your domain isn't in $mydestinations. Make sure that your domain gets relayed (and transported) to the internal mailserver.
I guess you are also going to teach him how to reject mails to non-existent users at the smtp level and not become an outscatter host.
True, there is more to it. http://www.postfix.org/postconf.5.html#relay_recipient_maps for starters.
I wonder why that should be necessary - it's his decision, and I can really understand, why he's making it.
I am glad that you can read his mind and learn about his environment.
See >:)
Ralph