Upgraded from openSUSE 42.2 to 42.3 on my backup computer. Almost all went
well, however, after the restart I could not see any emails initially. I
managed to fix that by changing the layout settings and changing them back.

The show stopper to move my main machine is that for local and imap folders
"move to trash" is greyed out. Seems like the delete key is working, however.
The bigger problem is that when right clicking the trash folder the option to
clear the folder is gone completely.

I did issue an akonadictl fsck and restarted akonadi. That did not help. The
trash folder is set correctly for the imap sever in the access settings.