draft-hoffman-smtp-tls: TLS vs STARTTLS

[jgmyers@xxxxxxxxxxxx (John Myers)]

At the last IMC Mailconnect interoperability event, we found that
implementations of draft-hoffman-smtp-ssl-06.txt did not interoperate
with Exchange 5.5, which conforms to an earlier version of the draft. 
The changes to the draft were to fix a vulnerability to a
man-in-the-middle attack.

At the meeting, there was general consensus to fix this problem by
changing the name of the EHLO extension from "TLS" to "STARTTLS", so
that Exchange 5.5 and implementations of recent revisions of
draft-hoffman-smtp-ssl-06 do not try to negotiate TLS.

Assuming that consensus holds on the ietf-apps-tls mailing list, I would
like to request this change be made before the document is approved as a
Proposed Standard.