Why you cannot delete Àll Mails` in Thunderbird ?

[Eeriik]

Reason is that you have 2 [Gmail].sbd in your imap.gmail.com Profile. Here is instruction in Linux           ( same goes with Windows, but diffrent kind of "Path") : home->.thunderbird->(Profile)    xxxxxx.default-release->ImapMail->imap.gmail.com->[Gmail].std. If there is 2, rewrite one by one           Old_[Gmail].std to see which is working to delete "All Mails"-file.

[Eeriik]

My TB-version is 102. Win 10 TB 115 horrible. I hade to go back to 102 in Windows 10.

[Eeriik]

Best way to empty "All Mails" is to go Gmail ( if you are using Gmail ) account and do the cleaning there. Because "All Mails" are restored there, that is why Mails are coming back to Thanderbird, when you are "Deleting" Mails on Thunderbird "All Mails" !