Post Office

Post Office is an extension that adds the option to bypass your default email provider.  You can keep sending via Outlook, Mail, etc. just by clicking links, but when you right-click you're presented with the option to send via a webmail provider.  You can select which providers are available on the options page. 

You can also toggle on Post Office's mail bypass by clicking the icon.  While toggled, Post Office will send mail links to your web mail provide of choice (set on the options page) rather than your machine's default mail client. Clicking again will return control to whatever you were using before for mail.

Supports:

* Gmail
* Yahoo! mail
* Microsoft Live mail
* Outlook Web Access (must provide the web access URL in options)