Mail won't delete anything.

It just makes them grey. i read some other threads, the preferences is what it should be. this just just started randomly. i tried "rebuilding" but that didn't change anything at all. i can't "delete" the inbox. my trash folder even seems empty, with the only emails that were deleted before the craziness existing in some drop down folder instead. those won't delete themselves either.

 

i guess i'll just delete that account and connect it again