Hi all,
Operating System: Debian GNU/Linux 10
KDE Plasma Version: 5.14.5
Qt Version: 5.11.3
KDE Frameworks Version: 5.54.0
Kernel Version: 4.19.0-16-amd64
OS Type: 64-bit
Processors: 4 × AMD FX(tm)-4350 Quad-Core Processor
Memory: 15.6 GiB of RAM
Thunderbird 78.10.0(64bit)
For some years, I have been using Thunderbird on Debian with no 
problems. Over a year ago I switched to gmail.com (Imap server) for my 
mail server. Everything went fine until about 6 months ago . All of a 
sudden I had an All-Mail folder that wasn't there before. Since then 
all of my Emails are bypassing my InBox and my filters. I decided to 
sort out the All-Mail by creating a new set of filters and running 
them on the All-Mail box. I completely cleaned out all 4000 or so 
Emails. As soon as I restarted Thunderbird all of the old Emails were 
downloaded from the web and re-filled the All-Mail box. Nothing in the 
InBox. In addition, I now have multiple copies of the same messages in 
all of my local folders. In short I have a real mess on my hands. I 
have seen various solutions on the web but none seem to work. I also 
noted that pop servers, unlike imap servers, store all of the files on 
the local computer. Could switching to pop solve this problem? Are 
there any other solutions? Please help.
Gary R.