What is your platform? Did you start sendmail? Is port 25 open? Can you email anything from the command line of this Box? -----Original Message----- From: Yolanda Covington [mailto:[log in to unmask]] Sent: Thursday, February 12, 2004 12:58 PM To: [log in to unmask] Subject: SMTP configuration This is my first experience trying to setup a LISTSERV. I followed the install instructions but there must be more to the configuration because when I try to send the test message I get the following NDR from the exchange server: There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <t #5.5.0 smtp;550 No such list.> Can somebody give me any suggestions? Thank you.