If you were to log in, you'd be able to get more information on your fellow community member.
Personally, I install Postfix whenever I needs a MTA. Postfix seems to be the best alternative to Sendmail. It provides Sendmail compatibility, in a more secure and modular way, with a configuration that is clear to understand. Postfix is also lighter when it comes to system load.
I used Postfix as a SMTP gateway for a 2000 active mail users messaging system. It was trouble free.