I set up a Mac OS X Server 10.3.9 in Brazil and its mail service is
running now perfectly, except that for any reason a major online
service based in US blocks our static IP address. Their postmaster
web site is merely a fake site, there postmaster help desk phone
number is dead, the postmaster e-mail address produces only
automated response messages. So I gave up, since there seems to be
no way to let them unblock our IP.
My idea is now, to relay mail to their members by our SMTP server in
Germany, which is not blocked by them. However, I do not want to
relay all mail from Brazil by the German server, since this involves
too much unnecessary long distance traffic.
I know, how to change the Postfix configuration files to relay all
mail by another SMTP host. But, how do I relay only for certain
destinations by another SMTP host? Is this feasible at all?
This is an area where exim excels and I'd suggest using it instead of
postfix. You can easily create separate mail routers in exim to
examine the recipients and based on their domain route the mail
through a smarthost or relay appropriate for them. Thing of this as
the smtp equivalent to routing in TCP/IP.
--
-dhan
------------------------------------------------------------------------
Dan Shoop AIM: iWiring
Systems & Networks Architect http://www.iwiring.net/
email@hidden http://www.ustsvs.com/
AIM: ColonelMode11780
iWiring designs and supports Internet systems and networks based on
Mac OS X, unix, and Open Source application technologies and offers
24x7, guaranteed support to registered clients, at affordable rates.
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