Форум спільноти Thunderbird

I have been a Thunderbird user for many years, although I stopped updating with 102.15.1 (64 bit) as the new features and benefits did not provide a benefit. In the past few months, emails in my Inbox have disappeared, without being manually deleted. Typically the Inbox will keep emails from today and dated back to about six weeks earlier. Everything else is gone but still on the Rackspace ISP. I have Thunderbird running on two PCs (office and home), one iPad and my iPhone.

My account settings are IMAP, SSL/TTS, and message sync don't delete anything.

I have reviewed suggestions online regarding fixing this; including reindexing, changing settings, etc. but nothing has worked. I know that I can create local folders and save a copy there but I did not have this problem before and it is inconvenient to have to save copies, then remember to look at the saved folder instead of the inbox. According to the tech folks at Rackspace the issue is either within my system setup or some change to the Thunderbird program (although I am still running 102.15.1). My preference is to restore the program to its original functionality instead of creating work arounds. Any advice is much appreciated. Thank you.

I have been using Thunderbird for about 15 years. I use POP3 access to download a copy of each email into Thunderbird, and then use filters to move emails from each of multiple accounts into a subfolder under local folders. I have one account which is no longer active, but all the emails were still stored in the subfolder. Today, I went to look at the emails in this account, which hasn't been looked at for at least 5 years. When I clicked the subfolder to see the emails, I got a popup window which looked like an OAUTH access window, not the list of my stored emails. I'm afraid I didn't pay much attention to the popup window, I just closed it so I could try again. When I closed the window, the subfolder disappeared. I have no idea how to get it back, since I still want to keep those emails. Does anyone know how to get it back?