In Outlook Express, go to the Tools menu and select Accounts

Select the account which you would like the SMTP relay service for and click the Properties tab.

This will take you to the next screen where you should click Servers tab to set them up for your SMTP relay service

After entering all the valid fields under the Servers tab as indicated below, click the option 'My server requires authentication' and click on the Settings tab at the bottom of the window to take you to the server authentication fields.

Once you have clicked on the Settings tab, you will see the screen to set up the Outgoing server authentication.

Important- The password you enter here is the password you selected when you bought the SMTP relay service, NOT the pop email account password.

you are now ready to send emails using SMTP Auth. Please note that each ASMTP Account that you purchase only works for the email account that you specify. It will not allow you to send emails from any other email account.