Windows 10 updated as possible.
Latest Thunderbird updated as it comes.
Couple of accounts connected to pop3 and smtp mailboxes.
And I have hundreds of filters.
Each account has like 200-300 folders with filters to move new messages, set colours, etc.
Folders are set to remove messages older than 30-365 days.
Problem:
I started receiving errors that message cannot be moved to folder. And it is like over 50 errors each time I open Thunderbird. Pop-ups comes in and i am clicking on "ok" like non stop until all mail downloads. Messages that should go to folder where filter is set, drop to Inbox folder. Some folders are being reset/repair by Thunderbird I think. But that does not help. After downloads are finished, when I select Inbox and do "Run Filters on Folder" everything works fine and filters run exactly like they should.
When it started happening:
This year, I do not remember when exactly, more or less February.
When it is happening:
It is happening when large amount of emails comes in. When I did not open Thunderbird for couple of days. When Thunderbird is open and couple of emails comes in, everything works fine.
What I did to try to fix it:
I thought it was Bad sectors on my drive, so I did check, but everything was ok, but to make sure I moved mail folder to other drive that is 6 months new. That did not change anything. I read about those errors, so I did for every folder: [right mouse click on folder]/Properties/Repair Folder. That did not help. I thought that for some reason the problem is with conflict between retention policy of folder to delete messages older than 30 days for example and moving messages at the same time but I can't confirm this. I was hoping that Thunderbird will fix the issue with next updates but it is still happening, so I am writing to let you know about the issue. I suppose that there might be few people that like to organise messages like me deeply with lots of filters. My guess is Thunderbird is unable to process lots of filters at the same time and that causes the issue.
