For those interested, I fixed the problem I mentioned below by deleting the SMTP Virtual Server and then recreating it. I wrote down all the settings in the old server before deleting it so I would be sure the new server had the exact same settings. The only thing I can figure is that something with the SMTP virtual server was corrupt and recreating it fixed the corruption.
-----Original Message----- From: Ritch Roberts [mailto:[EMAIL PROTECTED]] Sent: Monday, December 10, 2001 3:43 PM To: MS-Exchange Admin Issues Subject: External Users, Exchange 2000, and Relaying Before I installed SP1 I did not have the following problem. I have external users who use Outlook Express to get their mail and use our server to send messages. On the SMTP virtual server if I have the radio button under Relay Restrictions set to "Only the list below" and the check mark in the "Allow all computers which successfully authenticate..." I get the following error when trying to send a message: The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was '[EMAIL PROTECTED]'. Subject '', Account: 'mailhost.mobilefarm.com', Server: 'mailhost.mobilefarm.com', Protocol: SMTP, Server Response: '550 5.7.1 Unable to relay for [EMAIL PROTECTED]', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79 The checkmark "My server requires authentication" in Outlook Express is filled. I checked the archives and saw someone suggested putting the IP address of the server in the "Only the list below" section and this did not help. I have tried both the external and internal IP addresses for the server without luck. Before I installed SP1 the configuration above worked just fine. Now the only way users can send messages is when I change the Relay Restrictions radio button to "All Except the List below" Obviously this leaves us open to abuse. Any ideas? List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
