I basically did a stupid as I was having issues with getting mailto links working in chrome...
So what I did was set google-chrome as a preferred application for handling mail, which backfired and exploded in my face...
Now I seem to be stuck with my mistake as I can't seem to undo my changes:
^ what I want is the blank box as I don't have anything installed to manage mail...
I have a chrome extension that does that for me.
The Preferred Applications app creates desktop launchers in
~/.local/share/xfce4/helpers
for each associate category that has an assigned application.Removing those launchers unassigns the applications for those categories, thus clearing the associated app.
You can set your default mail app from the command line using:
sudo update-alternatives --config mail
Once prompted, enter the number of the program you wish to handle mail and hit enter.