Paul M Foster wrote:
>
>>
>> 1. This external relay will be the primary MX and relay all inbound
>> mail for example.com to a postfix server on my internal network for
>> processing and local delivery
>>
>
> This is a fairly standard setup, if I'm reading you right. There's a
> "smarthost" on the internet that accepts and relays mail for your
> domain, example.com. Your LAN mail server goes and gets this mail,
> usually via something like fetchmail, in a cron job if you like. The
> cron job operates from the LAN mailserver and fetches the mail to that
> server for distribution.
>
> Am I missing something?
Thanks for your reply. You have the gist of what I'm trying to
accomplish. That is a fairly standard setup but I want something that
is completely dynamic.
I believe I have figured it out.
External relay:
MX record for example.com is the external relay.
/etc/postfix/transport on the external relay should be
example.com smtp:internal.example.com
.example.com smtp:internal.example.com
as long as "mynetworks" is configured for the routable
address of my internal server it should process the outbound mail
from my internal server properly.
Internal:
/etc/postfix/transport on the internal server should be
example.com :
.example.com :
* smtp:outbound.example.com
(For security my internal relay will only be allowed to talk to my
external relay.)
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