Heh, m4...

Have you tried Postfix or Exim? What's the biggest load you've had in 
terms of load avg, queue size etc? What kind of machines have you run 
Sendmail on?

I can tell you first hand that Sendmail does not handle being slammed 
like Postfix does. I've seen Ultra 2s (circa 97-98 SPARCs) running 
Sendmail get slammed with tens of thousands of messages at once, and 
it's not pretty.

I've seen old versions of Netscape Mail server (3.x), Sendmail, Postfix, 
Exim, and a custom MTA written and run by a very large well-known free 
E-mail site owned by another very large well-known software company that 
starts with an M, and I can tell you that Sendmail is probably 2nd to 
last on that list in terms of performance.

Scott

Duane Attaway wrote:

>Other mailers have much promise and I've tried many, but always return to
>Sendmail.  Sendmail is light on resources, has a wonderful m4 macro
>language for configuration, and just works.
>  
>