The new build of Opera 10 (Build 1229) includes a new feature that allows users who clicked on the mailto link to switch to writing letters in various web-based email services, for example: Gmail, Yahoo! Mail and Windows Live Hotmail. This is very convenient for people using web mail instead of the installed email client.
With a clean installation, click on the mailto link to open a dialog box where you can choose between Opera Mail (M2), the system client, and several web services. When you select a mail provider and check "Do not show this dialog again" all such links will open in it. You can change the settings in "Preferences> Advanced> Programs"
In the current implementation, only link substitution with “mailto:” is supported, and many mail providers only understand separate parameters. How to fix it and deliver the service you need is written by Tim Altman . ')
As Anne van Kesteren notes (a representative of Opera Software in W3 HTML 5 and CSS 3 working groups, if I'm not mistaken ), browsers must support protocols and third-party content so that sites can get on the list without forcing the user to edit any settings .