[Mailman-Users] MS Exchange as a relay computer?

Angel Gabriel badmangabriel at lycos.co.uk
Tue Jan 28 21:39:49 CET 2003

Thanks you guys!!!
I have read all your comments about using exchange 2k as my relay, and I
can see the pros, and cons of such a job.

My mailman box, uses Postfix, and apparently, as mention in this thread
postfix can open multiple connections to the same domain, which would be
brilliant, as long as I can check to configure it.
Exchange, does the same thing. I have a 1/2 meg connection to the
internet, so I guess that's not too bad. I've also been directed at a
link that I may like to try, to add local cacheing on my mailman box.
What I will do, is test all configurations, and see which one kicks ass,
I mean works the best!

-----Original Message-----
From: mailman-users-bounces+badmangabriel=lycos.co.uk at python.org
[mailto:mailman-users-bounces+badmangabriel=lycos.co.uk at python.org]On
Behalf Of alex wetmore
Sent: Tuesday, January 28, 2003 4:10 PM
To: Jonathan Knight
Cc: mailman-users at python.org; alex at ph.st1.spray.net
Subject: Re: [Mailman-Users] MS Exchange as a relay computer?

On Tue, 28 Jan 2003, Jonathan Knight wrote:
> > >                                                         Exchange
> > > send a single message to handle all of those recipients instead of
> > > sending 5 or 10 as would occur when using the recommended batching
> > > 10 recipients per message for postfix and other popular Unix-based
> > > MTAs 
> > This is not true for postfix 
> That's not true for exim either.  It's a configurable option so that
> MTA's which refuse messages with more than X recipients (to avoid some
> can be catered for.  Exim can be configured with different limits for
> different domains 
> > > Exchange 2000 has no problem sending the same message to multiple
> > > domains at the same time.  The remote deliver agent on most Unix
> > > can only send to one domain at a time
> >
> > This is not true for postfix 
> Nor for exim.  It's a configurable option 

Sorry for the misinformation.  I was going by some information that I
learned on this list about two years ago stating that setting
MAX_SMTP_RCPTS to between 5 and 10 will increase parallelism with the

Will exim and postfix both open multiple connections to a remote
domain when there are many recipients for that domain on a single

The Mailman FAQ still recommends setting MAX_SMTP_RCPTS to 10 for
performance reasons, but doesn't explain why 


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