Considering the move proposed in this thread to move even SMTP to HTTP, how would preventing connecting to SMTP prevent spam when one can still POST to SMTP-over-HTTP?
Re:DNS-over-HTTPS
by paulddraper on Friday September 30, 2016 @11:13AM
(#12612932)
"We need to restrict this to prevent abuse."
-- time passes --
"We need to change everything in order to accomplish a task under these restrictons."
There is, however, https://www.w3.org/TR/tcp-udp-sockets/ - see section 10 for an example.