Many thanks to Kveri! I reversed steps 3 and 4 and now it works:
Disable SSL filtering
Close Thunderbird
Launch Thunderbird
Re-enable SSL filtering.
Thank you so much Kathryn. This worked for me. Spent most of the day on the phone with my ISP and checking Thunderbird settings, all with no luck. Then I stumbled upon this thread.
Problems with thunderbird and IMAPS
in ESET Endpoint Products
Posted
Thank you so much Kathryn. This worked for me. Spent most of the day on the phone with my ISP and checking Thunderbird settings, all with no luck. Then I stumbled upon this thread.