The problem is that /usr/share/applications/claws-mail.desktop is missing mimetype.
The workaround is: 1. add MimeType=x-scheme-handler/mailto; into /usr/share/applications/claws-mail.desktop 2. run update-desktop-database -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/788113 Title: can't set as preferred email application (anymore) -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
