I have Thunderbird 146.0.1 on a Win11 system, using POP. This setup has been in place from Windows 7, apart from the Thunderbird client version, and has worked up till th… (read more)
I have Thunderbird 146.0.1 on a Win11 system, using POP. This setup has been in place from Windows 7, apart from the Thunderbird client version, and has worked up till the end of 2025. About October last year, I opened Thunderbird, and whenever I selected an email, or a number of emails, Thunderbird seems to get stuck trying to process something. The moving blue bar on the bottom right hand side of Thunderbird shows activity, but never stops. Taskmanager shows that Thunderbird is running, and that something is happening, but I cannot do anything with Thunderbird. I can only shutdown Thunderbird using Taskmanager.
I have Norton AV installed, but I have turned it off, and the problem persists.
I have removed all the emails from my inbox, and moved them to local files, and the problem persists.
I have deleted and recreated my profile, and the problem persists.
I have deleted the Thunderbird client and reinstalled it, and the problem persists.
It doesn't matter if I select one, or twenty, emails, Thunderbird gets locked whilst processing something, and the problem persists.
There is no issue with my Email provider, as I have checked using a webmail client. Emails are being processed and delivered from my email provider, and are received by Thunderbird.
I would appreciate any suggestions as to the cause, or more importantly, a possible remedy.
I have successfully used Thunderbird for many years, and I actively support them, so I am very keen to resolve this problem.
Thank you in anticipation.