I further like the idea in that it can expand as a product in several directions. Eg. Also do a dns txt lookup for "chat" which can have a specialised server t

I further like the idea in that it can expand as a product in several directions. Eg. Also do a dns txt lookup for "chat" which can have a specialised server that the recipient is in control of (or subscribes to). It could bypass the legacy issues of email, but still provide a fallback in case the recipient uses email only.