I had my email bounce to protonmail.com but not proton.me and an not the original person. I don't think it's an exact redirect if it works at all... I assume i

I had my email bounce to protonmail.com but not proton.me and an not the original person. I don't think it's an exact redirect if it works at all... I assume it's a masked email address from the name, maybe those are treated differently?