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After deleting a large number of historical emails, including emptying the Deleted items folder, and emptying the Archive folder, Thunderbird restores a large number - but not all - previously deleted emails. Oddly the emails that are restored to the inbox are only ones from 2022. I have gone through and deleted them multiple times but they keep coming back. Any suggestions? Thanks, Simon.

I have a local folder which has 90 folders within it. These are folders brought over from Eudora (the mail system I used before Thunderbird). It would help me if I could easily move all 90 from their current "Eudora" folder to the big "main" folder that Thunderbird has. To make it clear what I'm asking, here's an example, using two folders, Danbury and Fritz.

D (folders whose names begin with D) Eudora folder, which has two folders - Danbury and Fritz F (folders whose names begin with F)

Is there any way to move the 2 folders that are currently within the "Eudora" folder so that they're "first level" folders. In other words, Danbury would be among the "D" folders and Fritz would be among the "F" folders.

The only way I know to achieve this is by manually creating the new folders, moving the items from the old folder to the new folder, and then deleting the old folder. This is cumbersome.

When a message is removed from a folder via that folders' Retention Policy, I assume the message is permanently deleted. Is it possible for that message instead to go to Trash? Thank you.