Hello all, I've got automatic updates set on my Thunderbird and after the update to version 78.4.0 I haven't been able to send emails anymore from any of my accounts. I tried with all of them (I've got ten), re-inserting all incoming and outgoing server info. All accounts can receive emails, but I can't send or reply to any of them. Whenever I try writing a new email or reply to one, the window for composing the message opens, I write the email address (when it's a new email), fill in the object and a test message, but the Send button keeps being grayed out. The address becomes red but it's as if the software didn't recognize it and, indeed, the address book is now empty. Also, In my settings, I had instructed TB to also add specific email addresses in the CC and BCC fields. It's always worked fine, but now after the update only the CC field is automatically filled in with the given email address, while the BCC field is empty. Please help me solve this issue! Thanks!