I'm not sure where this thread switched from search to email. However, one thing to test is that you have a mailserver running. One way to do that is
telnet localhost 25. If you get a connection(
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 localhost ESMTP
) then you can try
HELO and it should answer
250 localhost. None of this has anything to do with OpenACS. If you can't get this far, then the problem is with the mail program, not OpenACS.