Poco General FAQ - Recovering deleted messages

Q: How can I recover deleted messages?
You can either move them from the trash back to their original location or you can delete the ".d" file associated with the mailbox. For example, to recover all deleted messages since the last mailbox compress of your "In" box open Windows Explorer and navigate to the "Mail" directory, select and delete the "in.d" file.

In some circumstances it is possible to recover messages accidentally deleted from the Trash.