XWEB: POP3 Clients Not Authenticated by Exchange Server

• Microsoft Exchange Server, versions 5.0, 5.5
• Microsoft Outlook Web Access, version 5.5

SYMPTOMS

This problem occurs when you are using Microsoft Windows 95 and Microsoft Internet Explorer. When you start the Internet Explorer Internet Mail client, the Internet Mail inbox appears. When you click the Send and Receive icon, the authentication dialog box appears and requests your logon information. When you type the requested information, you are not logged on to Microsoft Exchange Server. However, you can telnet into port 110 of the Exchange Server and the following message appears:

+OK Welcome to NT Example POP3 server.

RESOLUTION

To resolve this problem:

• On the computer running Microsoft Exchange Server, ensure that the following services are not started in the Control Panel Services tool:
  
  
  • POP3 Server services
  
  
  
  • Local Mail Delivery Agent service
  
  
  
  • SMTP Server services
  
  
  
  If the above services are started, stop the services, set the services to manual, and then restart the server.

MORE INFORMATION

The above services are included with the Windows NT Server 4.0 Resource Kit as Mail Server (MailSrv) and are not part of Microsoft Exchange Server version 5.0 or later. For more information on MailSrv, please refer to the "Windows NT Server Internet Guide" Chapter 7 Internet Tools pages 147-154 included with the Windows NT Server 4.0 Resource Kit.

The POP3 Server Services service will claim port 110 on boot up if the service is set to automatically initialize. This in turn will not allow the Microsoft Exchange server to listen to port 110.

Keywords : kbusage XWEB
Version : WinNT:5.0
Platform : winnt
Issue type :