[Dovecot] Sizing MTA servers

[Adrian Zaugg]

Am 17.01.14 10:53 schrieb Stan Hoeppner:
> On 1/16/2014 6:56 PM, Murray Trainer wrote:
> MTA = disk.  Always has always will.  Disk throughput is always the
> critical factor for queue performance, and an MTA is little more than a
> queue.  Which makes it surprising that so many people ignore disk when
> talking about mail servers, as you have done here.
Exim tries to deliver every message without queueing it first. Exim
writes only those messages to the queue, which can't be delivered
immediately or if too many connections are coming in at a time. This
doesn't invalidate what Stan said, it should just clarify that under
"normal" operation the disks won't be stressed that much under exim.

It will be much more of a challenge to design the whole infrastructure
for reliability and to make the right decisions on your mail storage and
those machines than your mail frontend.

Regards, Adrian.