Sending mails by right clicking on a file: how to replace Evolution?

[Stegozor]

Thilo Six wrote:

>>> type about: config in firefox address bar.
>>> Scroll down to
>>> network.protocol-handler.app.mailto
>>>
>> The problem is that nothing changed. I also relaunched the window 
>> manager, but that didn't help either. By right clicking on a file and 
>> then on send to... I still have Evolution as the sole suggestion, 
>> nothing about Thunderbird.
>>
> 
> Menu > system > Settings > preferred App. (translated from german)
> 
> change the mail value to TB.
> 
> and:
> $ sudo dpkg-reconfigure mozilla-thunderbird
> 
> and choose gnome as preferred desktop.

I did this, and after that rebooted the computer. Unfortunately, my 
problem is still there. No other choice than Evolution when I right 
click on a file and then on send to...