I plan to install an email server on Red Hat 9.0 box. There are many email servers such as sendmail, postfix, qmail, etc...
From what I read, it seems that sendmail is not secured and not very good. How about Postfix and Qmail, and others (if you know)? Which email server you consider as good/verygood, in terms of security, performance, easy to install and manage, simple about licensing, etc.
If you've installed email servers and used them, please help and give your opinions. Any help would be appreciated.