More about IMAP
How Can I Move Deleted Messages to "Trash"?Some IMAP clients allow you to set the configuration so that all email messages marked for deletion are moved to a Trash folder. When you "empty the trash", the messages in the Trash folder are permanently deleted or expunged.
The main disadvantage of the Trash model is that is does not allow you to selectively expunge folders; everything marked as deleted is moved to the Trash folder and deleted.
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