A dynamic dns would solve that.
> However, /64 is not sustainable, it doesn't allow customer subnetting, and it doesn't follow IETF recommendations of “at least” multiple /64s per customer.
My E-Mail will always be hosted on a physical server that I own, that is located in my home, and I'll fight nail and tooth to keep it that way. It used to be quite common, so much so, in fact, that my first ISP sent a letter apologizing for blocking outgoing port 25, and detailing how to access their relay box.