Supporting Messaging Clients

Disable Authentication for Incoming Messages

To disable authentication for incoming messages:

  1. Start System Manager
    On the Start menu, point to Programs, point to Microsoft Exchange, and then click System Manager.
  2. Navigate to the SMTP virtual server.
    1. Servers
    2. Server
    3. Protocols
    4. SMTP
    5. SMTP virtual servers
    6. SMTP virtual server
  3. Right-click the SMTP virtual server, and then click Properties.
  4. On the Access tab, under Access control, click Authentication.
  5. In Authentication, select Anonymous access, and then click to clear the remaining check boxes for the other authentication options.