For users of Sendmail on NT, the package is just another transparent POP3 server connection to be added to their desktop mail application. The concept is simple, but answering it is hardly simple. As a result, 3R Soft provides a free trial license for 20 users with no time restrictions. There are a few rough edges, but all of the roughness OpenBench Labs encountered centered around external factors. The installation is carefully scripted not to step on your existing Web server.
Installation is trivial.
The only gotcha is to do it with an X-terminal window, since it distinctly does not play well with the standard Gnome console terminal. Once installed, it's time to dust off the bat book and configure sendmail. We ran into all sorts of problems with IE 5.0 and Netscape Communicator 4.72, which ships with Red Hat 6.2. Upgrading to IE 5.5 cured all of our problems. Unfortunately, upgrading to Netscape Communicator 4.75 did not.