How can I make Yahoo! Web mail the default email application on a Windows XP machine, hopefully without installing the Yahoo! Toolbar?
migrated from webapps.stackexchange.com Feb 9 '11 at 8:19
It is going to depend on which browser you are running:
Firefox: You can change it through Tools->Settings->Applications. Documentation on this can be found here.
Chrome: There is an extension to make this change occur easily. You can get it here.
Internet Explorer: It still looks like you need to get the Yahoo Toolbar to make it happen. You can get it here.
Safari: It looks to be a bit trickier. Here is a link on Super User on how to make it work with GMail using the GMail notifier, but this might be a Mac Only solution.