I hope you checked the "Trash" folder before posting here?

I will assume so.

We can try to recover them, but no guarantees.

1. In the Thunderbird menu, click "Help" then "Troubleshooting Information". (If you cannot see the Thunderbird menu, press the Alt key or F10 key on your keyboard to show the menu)

2. In the "Troubleshooting Information" window tab, click the "Show Folder" button, which is beside "Profile Folder" in the top section. This will open a Windows Explorer window showing the contents of your Thunderbird Profile folder.

3. Quit Thunderbird, but leave the Windows Explorer window open.

Now we are going to locate the folder that you accidentally deleted. For the purposes of illustration & example, I'm going to call the folder "90greatOops".

4. If you are using IMAP, then you need to open the folder in Windows Explorer called "ImapMail". If you are using POP, or the "90greatOops" folder was under "Local Folders" in Thunderbird, then open the folder in Windows Explorer called "Mail".

5. Now you want to tunnel down folders and look for two files that are named "90greatOops". One will be named "90greatOops.msf" (ie. will have the file extension .msf), and the other will be named "90greatOops" with no file extension.

6. Delete the file "90greatOops.msf".

7. Open the other file "90greatOops" (that has no file extension), in a text editing program like Notepad.

8. In the text editing program, look for the text "X-Mozilla-Status:" in the first e-mail. If the e-mail was deleted, then it will say:

X-Mozilla-Status: 0019

9. Every e-mail in that file will have a "header" that has "X-Mozilla-Status:". You need to do a search and replace to for every e-mail's "X-Mozilla-Status:", so then it will say:

X-Mozilla-Status: 0000

There are other numbers than 0019, so you will need to check for all possible numbers, and change them to 0000.

10. When done, save the file, making sure it is saved as a plain text file with no file extension again.

Then start Thunderbird, and see if you can find the deleted e-mails.

Thanks for your reply and effort I got it . Thanks again .

Thanks for your reply and great effort . I got it . Thanks again .