Relating to Thunderbird. Two email accounts, Gmail and Spectrum's "mail.twc.com", required setting up with Thunderbird. Gmail was no problem with immediate success. "mail.twc.com" was another matter. This particular account is setup and working on 3 Apple devices under IOS yet Thunderbird will not allow 'sign in' during 'texardvark@twc.com' - using SAME settings. Web searches reveal settings that should work however they don't correspond to options provided during Thunderbird setup. In particular, there is a log-in failure using same login credentials as IOS. This problem is not earthshaking as I can use TWC Webmail w/o any problems, just not through Thunderbird. I'm primarily providing this information toward your development efforts. I used Thunderbird with Linux and was pleased. Thought I'd give it a try on PC Windows 11.