Sam Jones:
> I guess what I'm querying in a way is some of the sales blurb from
> people like PowerMTA & GreenArrow and the remarks they make about open
> source solutions like Postfix etc. This one in particular: "Open source
> Mail Transfer Agents (MTAs) often max out between 20 and 30 thousand
> messages per hour.
That's 7 deliveries per second, a number that you might get with
an MTA that makes one connection at a time (Sendmail, Exim).
You get larger numbers with parallel deliveries. Those are built-into
Postfix/qmail/etc. With MTAs such as Sendmail/Exim/etc. you get
parallel deliveries by using parallel submission.
Once you reach the file system performance limit, Postfix/qmail/etc.
require parallel submission as well, with different MTAs running
on top of independent file systems.
As Victor says, it is not primarily an MTA problem. The technical
problems are a matter of proper diagnosis and appropriate tuning.
Wietse
