Migrating away from Google: Hello Proton Mail!
Google informed me they would start charging me for letting me use their mail servers with my gotofritz.net domain. Fair enough, infrastructure costs money. But if I have to pay, why pay them? I'm can shop around. And so I did.
Migrating Thunderbird message filters from another machine
Thunderbird doesn't sync message filters. Its roots are from ancient times, before distributed computing was prevalent. If you want to copy your filters from one machine to another you have to do it the old-fashioned way, by copying config files