Paul Heinlein wrote:
Yes, I did head to head comparisons about 5 years go on the same hardware. Postfix was the fastest, qmail was next, and sendmail was slowest. I believe I've also seen similar benchmarks posted on the net. I had to do independent testing to satisfy a skeptical consulting cilent.
In the systems I administer -- small sites, to be sure -- the MTA itself doesn't impact the speed of delivery nearly as much as anti-virus and anti-spam scanners.
Agreed.
Cheers,