MaartenW

I am having the same problem using Thunderbird 78.5.0 and EST Internet Security. It happens after sunday 15.00, detected monday morning. Disabling SSL/TLS: (Dutch:) Instellingen | Computerbeveiliging | Host Intrusion Prevention System |(Settings)| WEB EN E_MAIL immediately allows receiving mail from 'private' suppliers as well as Gmail. No reboot was necessary. It would be nice to be informed when this bug (ESET or Thunderbird?) is solved, so the security can be set back again.