If you are getting an error message stating the following:
The message could not be sent because one of the recipients was rejected by the server.
The rejected email address was '[email protected]'.
Subject 'test', Account: 'any account', Server:'mail.yourdomain.com',
Protocol: SMTP, Server Response: '550 not local host 'todomain.com', not a gateway', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79
Please follow the following step to resolve the problem.
Go to the Tools menu in outlook/outlook express, and click on "Accounts." You should then see this window. In this window, click on your domain until it is highlighted, then click on "Properties."
Click on the "Servers" tab when the next screen pops up. Now, check the box that says, "My server requires authentication" for Outgoing Server. Click "Okay". You MUST do this step so you can send mail from your domain.
Now, you're ready to send and receive mail! To set up multiple accounts, follow these steps again.