Perhaps I'm just dramatically dense, but I've been working with sendmail under linux since before RedHat was around. I've installed sendmail; it's running, but it's not accepting connections at port 25. I first noticed because fetchmail can't talk to it; I can't telnet to port 25. "Connection refused" I don't think I've changed any of the sendmail files that were installed by the RPM. There are no clues in the logs (messages or maillog). Thanks.
Sendmail listening was disabled prior to the beta as a security measure; this turned out to cause too many problems and it has since been switched back on. *** This bug has been marked as a duplicate of 16098 ***