Smart mailboxes always reset after restarting mail
Dear Mac-community,
I have a problem with my smart mailboxes in Apple Mail (High Sierra 10.13.2):
Closing and restarting the mail app always resets my smart mailboxes.
All changes made (editing an existing filter, creating a new filter or deleting one of the filters) are reset to the status as when I last opened the app.
My local mail folders are not affected (they can be changed etc.) - only the smart folders.
It feels like the responsible file holding the smart filter informations keeps being overwritten at each start (or something like this), but this is just a guess.
Any ideas how to resolve this issue? I want to be able to work with smart folders again.
Btw: Since I rarely make changes to the smart filter settings I can not say unfortunately, since when the problem exists.
Thanks for help.
J. Janda
IMAC (RETINA 5K, 27-INCH, LATE 2015), macOS High Sierra (10.13.2), null