On Sun, 2012-09-02 at 14:43 +0200, Gót András wrote: > 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
Thanks for the follow up Andras. Agree that it's not just the MTA, there is lots more going on. What I'm looking to do - taking out the other factors like network speed, recipient rejection etc - is to establish if Exim can compete with the so-called wonder MTA's like PowerMTA. Exim is my preferred MTA and I love it, I'd just like to be able to stick a couple of fingers up at the doubters and say 'yes, it can compete with that.' -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
