When I clicked on a mailto URI in Chromium, to my surprise Icedove was
started. Yes, it's installed, but only as a fallback, normally I use KMail.
And KMail is selected in System Settings > Default Applications > Email
The unwanted invocation of Icedoce apparently goes happens through xdg-email
and kde-open5. The latter presumably uses what it finds in /etc/mailcap. Now,
I figured out that I can affect the precendences with some magic entries in /
etc/mailcap.order. But I really think this should not be necessary.
Is this the expected behavior? A bug? What to do about it, apart from
uninstalling Icedove or editing mailcap.order?