From EmailAdept: Email Undelete for Mozilla Thunderbird, enabling you to undelete email messages that seemed to be gone forever. The software scans mailboxes and displays the list of e-mail messages available for recovery, allowing you to undelete the entire Thunderbird email database or the separate important emails. To make the program even more convenient, developers added filtering and Preview features that can be used to find a target email within a few seconds. Undeleted emails can then be renamed to ensure that you won't lose them again.
read more +