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I've just upgraded Thunderbird to 115.0.1 from (I think) 102. Now it fails to connect to any mail servers, either IMAP or SMTP: when trying to access mail or send it, Thunderbird just hangs and does nothing. I use Office 365. I tried deleting one of the accounts and recreating it, but it hangs at the point at which it says it's checking password. Does anyone know how I can get Thunderbird working?

I was forever losing the BD toolbar on the last release ot TB and had to keep uninstalling something and reinstalling it. On latest update of TB, all my settings have again been scrambled (it takes forever to go though every setting on TB!) and I've again lost the BD spam toolbar, even though it is installed and enabled. Can anyone remind me how to get it back without uninstalling and reinstalling the whole of Bitdefender, please?