When using a web mail service such as gmail or Yahoo! Mail, you may need to set your browser preference to use your preferred mail account. This is necessary even if you have set up to use the other mail service from your desktop, and disabled Outlook Express.

In Firefox, under "Tools", select "options"; click on "Applications", select "mailto". Change to use gmail or yahoo.

In Internet Explorer, under "Tools", select "Internet options"; click on "Programs", select "E-mail". If your preferred progam is listed in the pull-down menu, select it .

If all else fails, try setting up an account for only outgoing mail using Outlook Express.