Use GMail For Default Email Program in XP, Vista, or OS X
Web-based email clients can be a little painful because they are not closely integrated into the OS. Google has made it easy to integrate gmail into windows and apple systems.
XP/Vista:
First, install the Windows gmail notifier
The later installations of the notifier actually allow the user to setup gmail as the default email client from the installation. Just click the Use for outgoing email box.
If you already have gmail notifier installed, you can right click on the notifier icon in the system tray, select Options, and check Use Gmail for internet mailto: links.
Registry hacks to avoid using the gmail notifier are available as well.
OS X:
For OSX, the user should also install the gmail notifier.
1. Click the Mail icon on the Menu bar
2. Go to Preferences
3. Select Settings
4. Select Gmail in the Default Email Program dropbox






