As of this morning, Thunderbird will not send emails with Avast shields up - I'm getting the following error message:
Sending of the message failed.
An error occurred while sending mail. The mail server responded: See http://pobox.com/~djb/docs/smtplf.html.. Please check the message and try again.
Disabling Avast shields allows the email to go through without a problem - this just started happening this morning, it was working fine yesterday afternoon (nothing changed with the affected mail server, other PCs in the office have no problems sending). I've reset Avast's settings to default and uninstalled/reinstalled the program entirely, still having the same problem.
Program versions are:
Avast 22.7.6025 (build 22.7.7403.738)
Thunderbird 102.1.0
Any ideas on possible fixes, or if this is already a known thing?