I used to avoid clicking on email links on the web because an application on my computer that I never used would pop up and interrupt me. Instead, I would copy the email address, switch to Gmail, click compose and paste it in.
Starting today, thanks to the magic of HTML5 things are getting simpler. Now, when you go to Gmail in Chrome, you will be asked if you want Gmail to open all email links. Say yes, and clicking on email links in any application on your computer will open a fresh Gmail compose window.
You can set Gmail as your default mail client in Firefox and Internet Explorer, too