Actually, Redhat was blocking sendmail in 7.2. I'm pretty sure of this because I didn't know how to configure sendmail to not let any outside connections in. I wanted this because I only use sendmail for the back end to fetchmail to retrieve my mail from my ISP and to send out mail from the command line. So, I looked at Redhat's configuration file and copied the line out of it to mine. BTW, the magic line is DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA') which makes sendmail only listen to localhost. This is a good thing for a home user, not so good for a server which needs to be able to accept mail from the Internet at large. Hope this helps.
