I am, similarly, a hostage/victim of Frontier until I can afford Starlink. I do not use their email, I have Yahoo and Gmail accounts. Just because you get your internet from Century Link doesn't mean you have to use their email. The other advantage is that, when I do switch ISPs, my email is not affected. I do find that Yahoo will occasionaly send mail to the spam folder that doesn't belong there, but I have 30 days before they delete it.