On 23/03/2012 15:56, Alex wrote:
Hi,
I am trying to build a relay server using postfix-2.8.7 on fedora16
for one domain and a few sub-domains. This server should only accept
mail from two specific public-facing postfix servers that accept mail
for these domains, process the mail with amavisd/spamassassin, then
forward the resulting mail to this relay server.
Once the mail has been received by this relay server, it should
forward it into the internal Exchange server for the end-users.
Do I just define a few transport maps for this? Currently I have this:
mailrelay.example.com local:
example.com smtp:mail.example.com
dom1.example.com smtp:smtp.dom1.example.com
.dom1.example.com smtp:smtp.dom1.example.com
i would go to smtp:[smtp.dom1.example.com]25
in order to avoid mx record lookup for the domain.
adn the local: is not really needed.
just list the remote domains.
i would see some benefit with a main relay server that can be a
redundant point for the domain queue.
Regards,
Eliezer
Since this server isn't reachable by any hosts other than the two that
are trusted, there aren't any local users, and no real decisions need
to be made, is there really anything else necessary to do this?
What prevents you from simply relaying the mail from the first two
Postfix hosts directly to the Exchange server, instead of installing
this unnecessary intermediate relay? It would be a much simpler
solution, and cheaper, in hardware, power, cooling, management, etc.
What is your design goal here? As stated, all you're doing is literally
adding a temporary queue between the 2 Postfix and Exchange
servers--mail comes in, mail goes out. I fail to see the benefit of
such a setup.
Yes, the overhead could be avoided. I think the decision was made
because the systems are 3000 miles from each other and when the
systems were created more than ten years ago it was thought it would
be better to separate the services.
Thanks Stan,
Alex
--
Eliezer Croitoru
https://www1.ngtech.co.il
IT consulting for Nonprofit organizations
eliezer <at> ngtech.co.il
