Right click the folder, select properties and then the repair button.

Right click the folder, select properties and then the repair button.

I did. The messages disappeared from the list, too. That’s not an improvement. It's the same result as deleting the sent.msf file.

I hoped to restore the content of these messages, not lose them completely...

Repair my folder did not work. Messages are intermittently disappearing from the Inbox in one of my accounts. The message displayed is "No Messages Found" Snipped Image below indicates there are 326 messages but where are they?

I did find a filter for the problem Inbox and removed it. Did not seem to help. I can download and view a message. Leaving a message in that Inbox when I click on another account and then return to the problem account Inbox the message has disappeared and shows "No Messages Found". Attached is a

For some reason I cannot move files from other folder (ie. Trash, Sent) into the problem Inbox. I also cannot move files from other Email accounts into the problem Inbox. When I try to move messages to this Inbox all I see is "No Messages Found".

SOLVED: Kept working on the problem and the following solution seemed to be working. 'Open Thunderbird> highlight problem Inbox> click View> point to Threads> click All' All my messages appeared and then I had to clean up the Inbox by Deleting or Moving to another folder. Now when I click on Inbox Properties my missing messages dropped from 326 to 2 what I reduced to in my Inbox.