My suggestion is to run an email server inside your home that connects to a single server on the internet (like a VPS) that routes your mail for you. It's a bit

My suggestion is to run an email server inside your home that connects to a single server on the internet (like a VPS) that routes your mail for you. It's a bit more complex to setup but much more secure and reliable and almost certainly won't violate ISP rules as long as you keep it secure.