Making The Change To SMTP Authentication
Outlook Express / Outlook - Microsoft Windows
Start up Outlook Express by clicking it's shortcut icon on the desktop or by finding the application under your 'Start' menu, navigate to the menu bar at the top of the screen and select "Tools" followed by "Accounts".

A new window appears listing your email accounts. Selecct the appropriate email account in the list and click the "Properties" button. This will display a new window.

In the resulting window, you will be presented with a number of options. Across the top are "Tabs" - Select the tab labelled "Servers"

At the bottom of the server settings page, there is an option labelled "My server requires authentication". Tick this checkbox and then click the button labelled "Settings" beside it.

In the Outgoing SMTP Server settings dialog, make sure that the option labelled "Use same settings as my incoming mail server" is checked and click OK. Now you are back to the Server settings window, click OK once again and close the email account list.

Test the new settings by sending an email to yourself. If the message leaves your outbox without complaining, you have successfully changed your settings. If you run into problems and Outlook will not send your email, check that your Outgoing SMTP server is set to the correct domain name i.e. the bit after the @ symbol in your email address and also remember that these changes only come into effect after October 12th.