RFE: The popup context menu for mailto:-links should offer a way to create the matching email by a template (however... this can be problematic if the mailto:-link itself provides informations for the emails body...).

Many other bug reports show the need for default templates in various situations (107876,...). In the case of a "mailto:", it may be very useful to have variable template depending on the context. Even if it is not universal it would be useful inside an intranet for example. This could be done with the "mailto://name@domain.com?subject=my_template", so that if a template exits having for subject "my_template", it is started instead of the default template. I see no inconvenience to this way of processing mailto and many advantages.

This feature would allow nice uses, for exemple you can have a personnal .html page that you start under Firefox, which describes your main tasks and links on the corresponding template in Thunderbird (for exemple this will implement the recipient-based template described in 107876 bug report)