Received email directly marked as read

My received emails are directly marked as ‘read’. When I repair the inbox, they appear as ‘unread’. It is a pop-box. I also use an IMAP mailbox for another account.

What can I do to change this behaviour?

(thunderbird 91.2.0 build: 20211004152603, windows 10 64)

The likely solution is to disable Bitdefender add-on in Thunderbird.

Thanks for your quick response. I’ll try that!

Hi @wsmwk,

It looks like that did the trick. Now, wait for an update from Bitdefender?

That, and complain to them about the problem.

Yes, I opened a ticket at bitdefender.

let’s watch and see!