I'm not finding much about TMTP or postnotify with a search through Google. Could you link to some resources?

I've only just begun publicizing it, after getting the client & server implementations to a point where folks can evaluate them.

Protocol: https://github.com/networkimprov/mnm/blob/master/Protocol.md

Why TMTP? https://mnmnotmail.org/rationale.html

Follow: https://twitter.com/mnmnotmail