Yahoo Mailto HandlerYahoo Mailto Handler 
This simple AppleScript applet is designed to handle mailto URLs. When you click on an email address on a webpage, it directs you to Yahoo's webmail "Send Message" page, pre-filled with the email address. If additional fields like subject, CC, BCC, and body text are included, they will also be populated automatically for a seamless experience.
To get started, open the Internet control panel on your system and select this applet as your Email Application in the Email tab. We're actively working to extend compatibility with other popular webmail platforms, as long as they support sending mail via URL-based input. If you're interested in contributing, feel free to get in touch!
Note for Netscape users: Netscape may ignore the selected email application set in the Internet control panel. To adjust Netscape's email handler, run a simple AppleScript in the Script Editor. This applet will be updated in the future to automatically manage email clients for Netscape users.