The last email I received from any ISP through Thunderbird 78.5.0 was on 11/27/2020. If I fire up Outlook, I get all the mail I missed over the past 3 days. I've tried re… (read more)
The last email I received from any ISP through Thunderbird 78.5.0 was on 11/27/2020. If I fire up Outlook, I get all the mail I missed over the past 3 days. I've tried resetting the security.tls.version.min value to 1, per this article https://support.mozilla.org/en-US/kb/thunderbird-78-faq#w_how-to-enable-outdated-security-protocols-tls-1-0-and-1-1 and that hasn't helped.
So, I know that my 3 different ISPs are not all having trouble (since Outlook receives my test emails and old email that were sent during the Thunderbird "outage", and my phone received the missing emails).
It doesn't appear to have anything to do with the TLS version, as setting it to 1 has no effect.
I know the date this occurred was 11/27/2020.
I've rebooted the computer and restarted Thunderbird multiple times.
I've tried STARTTLS (which Thunderbird defaulted to) and SSL/TLS (which my ISPs all give as their correct server settings) and nothing makes any difference.
The status bar at the end shows "Checking mail server capabilities..." and never progresses any further.
What else can I try?