[lorenzhs]

Well I think it's a good idea to prevent web pages from just opening up a socket to some server, speaking whatever protocol they like. It could be easily abused to spam, etc.

There is, however, https://www.w3.org/TR/tcp-udp-sockets/ - see section 10 for an example.

[kuschku]

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?

[paulddraper]

"We need to restrict this to prevent abuse."

-- time passes --

"We need to change everything in order to accomplish a task under these restrictons."