Working with Exchange

[Drew Marshall]

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On Tue, November 1, 2005 09:31, Drew Marshall wrote:
> On Tue, November 1, 2005 02:08, Mark Presling wrote:
>>
>> Jon Miller wrote:
>>
>>>Do it on a domain level, we do this all the time and it works very well,
>>> you'll have to set up a relay_domains  for the  mail for the client.
>>>The way we've set it up is to accept on postfix -> mailscanner (spam and
>>> virus with Sophos) -> postfix -> domains.
>>>
>>>
>> Doesn't Postfix just lookup the MX entries for the domain in
>> relay_domains and send it on to the higher priority MX than itself? Do
>> you have to run your own internal DNS that flips the MX entries?
>>
>> What I mean is, if you have your server set up as the MX on the Internet
>> DNS servers for somedomain.com (and not their own server), how do you
>> use relay_domains feature of Postfix to forward it on to their server
>> without DNS changes?
>
> It can be done using internal and external zones but that does make life
> far more complex than it needs to be. From the Postfix point of view, just
> make an entry in the transport file like:
>
> domain.tld   smtp:exchange.domain.tld #This assumes you make an 'A' record
> for exchange.domain.tld otherwise do
> domain.tld   smtp:exch.ip.add.ress

Bah, that ^^^^^^^^^^^^^^^^^^^^^^^^^^^ should read:
domain.tld   smtp:[exch.ip.add.ress]

/Note to self: Read before Send...

>
> and postmap the transport file. There is quite a lot of Postfix stuff in
> the wiki (As and when Jules is able to de-smoke it and make it available
> again).
>
> AFAIK Exim is fairly similar although it is routers that you configure (I
> don't know much about Exim so don't take my word for it ;-) )
>
> Drew
>
>
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