#996106 thunderbird: Restore a false junk email from junk folder puts it ALWAYS in the trash

Package:
thunderbird
Source:
thunderbird
Description:
mail/news client with RSS, chat and integrated spam filter support
Submitter:
rpnpif
Date:
2021-10-11 10:21:03 UTC
Severity:
normal
#996106#5
Date:
2021-10-11 10:18:37 UTC
From:
To:
Dear Maintainer,

Some messages are detected as false junk email and put in the junk folder.
I restore the false junk email moving in the input folder but automatically and always (!) TB put it in the trash folder.

How ?
1. Receiving a clean email sent by example@gmail.com for example in the IMAP Input folder named "Courrier entrant" (French language).
2. The junk detection put it in the junk folder named "Courrier indésirable".
3. I marked this email as HAM and I move it in Courrier entrant.
4. Some short seconds after, TB put it in the trash folder named Corbeille.
5. I moved it again in Courrier entrant.
6. Some short seconds after, TB put it in the trash folder named Corbeille.
7. And so on...

Only some messages had this issue.

The result.
It is impossible to restore this email.
I can lost emails.

Workaround.
Disable the junk detection AND restart TB.

Expected.
When a simple and clean message is mark as a non-junk, I should be able to put it in the Input folder. It should not be put in the trash.

This issue occurred in one machine always in one IMAP account but randomly and rarely in other account. The filters have no effect.