On Sat, 16 Aug 2003 14:18:42 -0400 David Hart wrote:

> We're pretty committed to Postfix but I never considered Exim. Any
> comments? Can anyone tell me how this compares to Postfix? I looked at
> the Exim docs. It's hard to appreciate the comparative complexity
> without actually installing and configuring.

Amazing flexibility. You can make exim do almost anything, except
perhaps, make the tea and coffee :)

Exim has far more features than postfix, qmail or courier-mta and the
documentation is excellent! While exim may not offer the power of
sendmail, it is far easier to understand an exim configuration than an
equivalent sendmail config. Exim is perhaps not as fast as postfix, but
this would only become noticeable with large volumes of mail, and even
then, exim can be tuned in many different ways to handle this load well.
Freeserve in the UK uses exim for large mail volumes, and works well.

Exim has an all-in-one model; a single binary does everything, from
handling incoming email, to rewriting, aliasing, authentication
and outbound SMTP delivery, as well as local mail delivery and
filtering, forking off child processes as necessary, quite like
sendmail. Postfix, as you know, has a modular design. This is may be
important to you.

But there is a negative side to exim too. Such feature-rich code also
has numerous bugs. Just peek at the changelog to see what I mean. The
author is great though, and he does respond very well to comments, bug
reports and feature requests very well.

Many sites run exim without any problems, and some of the bugs are often
irrelevant to many sites, since they are not using some features. The
mailing list is also good, with many knowledgeable folks offering
support and advice.

I like both postfix and exim and if asked to choose between the 2, I'd
have a hard time making a choice. Best is to install it, and play with
it, and try using some of its power-features, comparing how they differ
from postfix.

-- 
Anand Buddhdev
http://anand.org


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