Re: [Exim] Exim performance and capacity

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Author: yann
Date:  
To: root
CC: exim-users
Subject: Re: [Exim] Exim performance and capacity
On Fri, Jan 14, 2000 at 09:37:49AM +0000, root wrote:
> I'm looking to set up a _very_ large mail server which has the potential
> to be handling up to 1 million deliveries per day. (and no, it's not
> going to be spamming people :-) ). Obviously our system will be using
> multiple mail servers , but I was wondering what people's experience is
> with exim as far as capacity speed and scalability are concerned, and
> would it be able to handle deliveries on this scale. I have looked at
> the FAQ, but I just wanted to get a broader idea of people's experiences


Planet is hosting freeserve (as you might be aware off) and we are using
exim without any major problems. We host 2 million users, so about 10
million emails a day -- or something like that ;>

All minor problems and bugs were always solved by Phil in less than 24
hours making it one of the fastest response to problems I know off.

Exim configuration has a LOT of options and it is well worth
experimenting with different settings to see how it can improve your
performances. For example, it is not worth to run more than one queue
runner every 10 minutes -- disk IO being the limiting factor.

Exim is limited by disk IO, so make sure that you have as little of it
as possible.

All in all, I have found exim to be the best MTA for the job.

-- 
Yann Golanski                               Internet Systems Developer
PGP: www.kierun.org/pgp/key                 Postmaster for the Planet Online