Presumably there's a legal argument that you aren't providing a public service. Helm is tunneling SMTP connections from their cloud-based servers to your device

Presumably there's a legal argument that you aren't providing a public service. Helm is tunneling SMTP connections from their cloud-based servers to your device over an encrypted connection, so you could claim you're really consuming their service, not providing your own. But I wonder how much VC money you need to outlast Comcast in court...