Sept 5 up dated Thunderbird 115.15 to 128.2. Oesr (32 bit) (Computer is 64 bit op system) Won't download or send messages via mail.shaw.ca. server. (Canada) So, changed imap server ports from 587 to 993, (default 143) left normal password , tried security STARTTLES to SSL/TLS and nothing, changed outgoing Port 587 to port 25. Still won't connect to mail.shaw.ca. For now only get mail on their server only. Can you help? I have used Thunderbird forever and donate. Don't want to use another app.