3101
Most common reason
Most common reason
- Password has expired or the account is locked out
SMTP authentication error
SMTP authentication error
- Consult with your mail administrator to verify that the login account name and password required for SMTP authentication is correct
Is the server operating correctly?
Is the server operating correctly?
- Make sure that the network environment (server, hub, or other LAN network) is operating correctly
Is the correct authentication method set as the same as the destination computer?
Is the correct authentication method set as the same as the destination computer?
- Check the settings on the server and client
- (For example, make sure the SMTP/POP authentication enable/disable settings are the same on the server and on the client.)