Any mail transfer agent that needs a [link|http://www.oreilly.com/catalog/sendmail3/|1232 page manual] to describe it seems to me to have problems. :-/

I used sendmail on OS/2 years ago. The fact that the sendmail config file required TABS turned me off. That, and its syntax is really obtuse.

If you need what it does, and can understand how to configure it, and have time to keep up with the patches, sendmail can be a great tool. Otherwise, I'd investigate something a little more transparent myself. YMMV.

Cheers,
Scott.