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Re: Default MTA for Fedora 7

On Wednesday 07 February 2007 10:21, David Woodhouse wrote:
> On Wed, 2007-02-07 at 09:36 -0500, Jarod Wilson wrote:
> > As for the performance issue someone else quoted regarding exim... At one
> > point in time, I worked at a place that had lots of mail servers moving
> > tens of millions of emails per day. There was no way in hell exim could
> > handle the load (we tried). Both sendmail and qmail (ew) had their issues
> > as well. Postfix was rock-solid, and had no problems holding up under the
> > stress. Granted, this is a few years ago now, so postfix could have
> > regressed (unlikely) and the others (save qmail) could have improved...
> I've heard anecdotes the other way round too, and there are some very
> large deployments of Exim. I suspect that it depends a lot on how
> well-tuned it is. With large queues, you definitely need the
> 'split_spool_directory' option turned on to avoid putting too many files
> in a single directory -- it's going to suck quite hard otherwise;
> especially on older kernels. You may also want multiple queue-runner
> processes in parallel, if you have a large number of mails stuck on the
> queue that aren't immediately deliverable.

Cool, I figured the situation was probably better nowadays. My anecdote is 
from at least three or four years ago on Red Hat Linux 7.x systems.

Note to self: give exim a try one of these days...

Jarod Wilson
jwilson redhat com

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