Girish Venkatachalam <[email protected]> writes:

> Since MX records do not understand TCP port numbers, we cannot have
> different MX records point to different
>  SMTP servers on the same IP address.
>
> The reason this is a problem is that assume that I have to run
> spamd(8) against 100 domains. Do I need to have
> 100 different IP addresses in my cloud?

You've tried to solve the lack of IP addresses problem by running SMTP
servers on alternative ports on the same host.  If shortage of IP
addresses is the hardest problem to solve, it's probably easier to
make a working setup if you go for virtual domains (search for
$yourMTA virtual domains).

That said, running spamd in front of hundreds of different boxes all
doing their own SMTP stuff is very doable too, if you have enough
routable IP addresses.

- Peter
-- 
Peter N. M. Hansteen, member of the first RFC 1149 implementation team
http://bsdly.blogspot.com/ http://www.bsdly.net/ http://www.nuug.no/
"Remember to set the evil bit on all malicious network traffic"
delilah spamd[29949]: 85.152.224.147: disconnected after 42673 seconds.

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