Deduplication gone wrong, possible to restore lost emails?

Deduplication gone wrong, possible to restore lost emails?

Hello,

During yesterday's technical issues I tried to back up two accounts to offline folders via IMAP/Thunderbird. I noticed many duplicates and ran a deduplication add-on, and after that many (non-duplicate) messages disappeared. It is possible this add-on malfunctioned but I have used it many times and never experienced data loss. The missing messages aren't on the Trash in the webmail UI, which is where I would expect to find any deleted messages. They've just vanished.

Is it possible to reset the two accounts to how they were yesterday morning. or the previous day? we use secretary@ and paul@ and I'd like to recover the missing messages. Alternatively, restoring all deleted messages from both accounts from the last couple days would work too.

Thanks