Don't forget to add the MimeType.
Example file, opens GMail but ignores the mailto: content :-/
[Desktop Entry] Encoding=UTF-8 Name=Desktop Webmail GenericName=Email Comment=Compose email in browser Comment[de]=EMail in Browser schreiben Exec=desktop-webmail %s Icon=desktop-webmail Terminal=false Type=Application StartupNotify=true Categories=Application;Network;Email MimeType=x-scheme-handler/mailto X-Ayatana-Desktop-Shortcuts=Compose
[Compose Shortcut Group] Name=Compose New Message Exec=desktop-webmail mailto: TargetEnvironment=Messaging Menu;Unity
Don't forget to add the MimeType.
Example file, opens GMail but ignores the mailto: content :-/
[Desktop Entry] webmail %s webmail Application; Network; Email x-scheme- handler/ mailto Desktop- Shortcuts= Compose
Encoding=UTF-8
Name=Desktop Webmail
GenericName=Email
Comment=Compose email in browser
Comment[de]=EMail in Browser schreiben
Exec=desktop-
Icon=desktop-
Terminal=false
Type=Application
StartupNotify=true
Categories=
MimeType=
X-Ayatana-
[Compose Shortcut Group] webmail mailto: nt=Messaging Menu;Unity
Name=Compose New Message
Exec=desktop-
TargetEnvironme