You need to test whether or not SMTP authentication is working with Symantec Messaging Gateway.

To test SMTP authentication via telnet:

1. In a telnet client such as PuTTY, connect to the SMG appliance:
   
   telnet <SMG_IP_address>  587
    
2. Greet the mail server:
   
   EHLO mailserver.com
    
3. Tell SMG you want to authenticate with it:
   
   AUTH LOGIN
   
   The server should return the following, which is a base64 encoded string that requires your username:
   
   334 VXNlcm5hbWU6
    
4. Paste the base64 encoded username. For example:
   
   dXNlcm5hbWUuY29t
   
   The server should return the following, which is a base64 encoded string that requires your password:
   
   334 UGFzc3dvcmQ6
    
5. Paste the base64 encoded password for the username. For example:
   
   bXlwYXNzd29yZ$4

Note: If you receive an error from this point forward, double-check the password and encoding.

Additional information

If you need to manually convert the username and password, search online for a base64 encode and decode tool.