So I have a Gmail (G Suite Free) account, and I use Thunderbird on any computer I use regularly. Gmail is painfully slow to being almost unusable on Firefox. So

So I have a Gmail (G Suite Free) account, and I use Thunderbird on any computer I use regularly. Gmail is painfully slow to being almost unusable on Firefox. Sometimes I cannot get emails to send. So if I'm logging in temporarily, I'm usually forced to use Chrome. I think is just one example of Chromium being a bit too ubiquitous, and forcing users into the Google black hole. Is there an affordable paid custom domain email option with good spam filtering?