Mac users who want to use Gmail (or some other webmail service) as their default email app rather than Mail.app already have at least three ways of doing it.

With the launch of Firefox 3.0, there is now another way for Firefox users.

All you have to do is enter the following text into Firefox 3.0′s address bar and hit return:

This will register Gmail as the default handler for any mailto: link you click on in Firefox. Of course it doesn’t work for mailto: links in other apps—say, a web archive or note in Yojimbo.

To undo it, just reselect Mail.app as the default in the Applications tab of Firefox’s Preferences.

For a comprehensive solution, you still can’t beat Webmailer which is easy to use and free.

[Via Torben Brams ] gmail, firefox, mailto, default email app, web mail

Webmailer is a System Preferences pane that offers a quick and easy way to set a variety of webmail clients as the default handler for composing new messages from mailto: links.

Gmail users already have options to achieve this, but this new utility makes the same feature available for users of a range of web-based services including .Mac, SquirrelMail, AOL, Hotmail, Horde, Roundcube and Yahoo!

After installing the preference pane, all you have to do is select webmailer as the default client and then select one of the preset webmail services:

The readme contains detailed instruction on how to create customised links for other webmail services.

The developer created Webmailer to ease a terrible affliction:

Ever click on a mailto: link, only to scream in frustration as Apple Mail opens yet again? The curse of the webmail user is that there is no way to get around this problem. That is, until now.

Webmailer comes in a Tiger and a Panther version due to the different ways in which default emailers are handed by the two systems.

Get the right one for you from the developer’s web site .

UPDATE: Works with Joyent too! See the comments.mail.app, apple mail, plugins, system preference, webmail, gmail, dotmac, .mac, yahoo, horde, squirrelmail, hotmail, email, mailto: