despite the questionable politics of the author, I use mutt-wizard, and using its configs, a simple "v" instead of "o" will open the mail in the open web-browser. I've found this more than acceptable for reading html mail.
I don't use it for work, only personal use, though, so ymmv.
Do you feel like you shouldn't use it because of the author's politics? It's not like he gains anything from you using it. Even if he gained money from it I don't think there's any reason to believe he'd use that money to further those political opinions.
kyorochan|1 year ago