MailTo links are a convenience feature allowing you to click on a link and have your default mail client open in 'compose mode' with the addressee (and sometimes the subject) already filled in for you.

This subject is a bit more complicated when using a browser-based mail client like Zimbra, Yahoo Mail or Gmail.

If you use the popular Firefox web browser, you can use this method to make MailTo links work well.

1. Add the MailtoWebmails add-on to your Firefox
   1. Per user (not system-wide)
   2. https://addons.mozilla.org/en-us/firefox/addon/mailtowebmails/
2. Use the about:mailto