Thunderbird Community Forum

After changing from POP to IMAP to fix the earlier delivery problem, I have lost the existing file structure, filters, etc. Comcast email is coming in fine but there are only 6 folders while there should be 47 and all the filters s are gone. I have tried rebuilding the current global-messages-db.sqlite file but it stops after 12 hours and was only 10% finished at 2 GB instead of the prior anticipated 16 GB. These are the Profile directories: 04/28/2025 12:53 AM 26,073 MB 3249x1co.default-esr-3 04/27/2025 11:30 PM 358,524 MB 6rvpjum0.default-esr-2 11/21/2024 09:29 PM 249,883 MB 6rvpjum0.default-esr-2_sav 11/21/2024 09:29 PM 6.3 MB dvldbfwi.default-release

How can I resurrect my file system and filters?

(1) Over the past year (maybe more?) folders move in Thunderbird seemingly by themselves. Which folders move is random. Then message filters don't work properly so the filter is unchecked until I move the folder back where it should be and reenable the filter. (2) Occasionally folders disappear completely, so I have to recreate and repopulate them. (3) Sometimes filters are disabled with no apparent cause. (4) More recently, Thunderbird filters can't find folders (though they appear to be in the correct place) so the filters also get disabled. Reenabling the filter doesn't help, and I have not found a workaround for this. Seems to be more and more frequent. (5) Yesterday whole folders were empty of messages that had been there the day before. One folder (on a W11) hasn't any messages for the last month, though on MacBooks the filter that feeds it is working OK.

I am not doing anything to cause this. I suspect it is a setting that either Mozilla or Comcast or Microsoft has changed. What can I do to stop this without having to switch to a different email system entirely?