Finally figured out my problem. Sendmail (yea, I know, it's buggy, but it's the only MTA Redhat ships, AFAIK), uses cyrus-sasl to authenticate. I had installed: cyrus-sasl-md5-2.1.7-2 cyrus-sasl-2.1.7-2 Since their required be sendmail. Outlook only authenticates via logon authentication, which requires cyrus-sasl-plain-2.1.7-2. At least it gets him in business. Next I'll add ssl. Anyone want to rent a e-mail drop? _______________________________________________ TCLUG Mailing List - Minneapolis/St. Paul, Minnesota http://www.mn-linux.org tclug-list at mn-linux.org https://mailman.real-time.com/mailman/listinfo/tclug-list