when trying to deleter emails from Trash (IMAP) emails keep reappearing.
If you have Windows see the below post from @Gary in the following thread.
https://forum.emclient.com/t/item-cannot-be-delete-from-trash/95660/2
Or if you have a Mac, “close eM Client” and open a Terminal and paste in this command & enter.
/Applications/eM\ Client.app/Contents/MacOS/eM\ Client /dbrepair
When that is done, reopen eM Client as see if you still have the issue.