RE: Why do so few mail providers support Port 587?

owner-nanog@merit.edu wrote:

Joe Maimon wrote:

...

We need 587 because trusted authentication in SMTP does not transit with the message. So there is no way to require authenticated email only from all systems that would be worth a damn.

Local delivery only unless authenticated isn't worth a damn? Is this really that difficult??

Andrew

Sorry, I misread that. But I still fail to see how 587 changes that. Trojans, viruses, etc. etc. etc. can still exploit the authentication system regardless of what port it operates on. Different port, same old problems. Andrew