I am using Thunderbird 78 and receiving and sending e-mails has stopped working with an error message that my security (or something, can't rememember now) is not supported.
On my server settings, Security Settings was set at STARTTLS, set security to none
After this, receive mail was working.
I reset to STARTTLS and went into Options and Andvanced settings. Scrolled down until I reached: security.tls.version.min
THis was set to 3, which in the recommended TLS level recommended for just about everything. I set this to 1 and e-mails were working again with encryption on.
Can you advise if this is a Thunderbird problem, or an issue with one or more of your servers. If so, when will this be fixed.
