On Sun, 02 Sep 2012 10:40:12 +0100, Ron White wrote:
Good morning,
More to satisfy my own curiosity than anything else, I'm wondering
about
the performance that could be squeezed out of Exim in a bulk mailing
capacity.
I have a client that currently uses and ESP who have an astounding
throughput of up to a million messages per hour. This brought up a
discussion about high-performance MTAs and tuning and the general
comments I'm hearing are that things like Exim, Sendmail & Postfix
are
just not man enough for such a task and the absolute best you could
expect from any of them is about 100k messages per hour.
Now, I like to wipe out the fact from fiction because people like
PowerMTA are looking to sell their products and it would be in their
interest to neglect that any MTA (Exim/Sendmail/Postfix) could be set
up
in a way that would easily rival their product.
Can anyone on the list tell me if it's possible to performance tune
Exim
to a point where it could complete with this and possible strategies?
Kind thanks
Ron
Hi,
The bottleneck is usually the remote party which will ban your address
temporarly if you send huge amount of mails from one address. At that
number of messages even network latency and bandwidth will come into the
picture. It's also a question that what's the target message (full size)
that should be delivered? My last question is that what 'thruoghput'
means? Does it mean completed deliveries or that they simply accepted
the mail and they're sitting in the queue?
So I think it's not a matter of MTA fine tuning, but a complete tuning
of the OS (and hardware) that runs the MTA and the MTA itself of course.
For example putting the mailq onto an SSD or into memory might give
quite a boost to any MTA. :)
Regards,
Andras
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