How to stop Apple Mail from opening when you click on an email address

Raise your hand if you use Gmail's (or another web-based email service's) web interface for email correspondence.  My hand is up too.  In doing so, one thing is is a little annoying is when you click on an email address on a website somewhere, and Apple Mail opens up.  If you use another stand-alone app (Entouage, for example) to check your email, it's easy to switch the default app, but if you are all web-based, they don't make it quite so easy.

The following will not open up a Gmail window, but at least it will stop Apple Mail from opening.

1.  Download and install RCDefaultApp (direct download link)

2.  Open the app up from your preferences and select what happens with email address links:


Select "Email" on the left side, then select <disable> as the default application.

Now, when you click an email address, nothing will happen.