On Jan 29, 2005, at 10:56 PM, Bruce Lilly wrote:
Q: Is there a list of changes from RFC 2476? [As the request is to
advance to Draft status, it would be nice to know if any changes
are of such scope and substance as to warrant remaining at
Proposed. Such a list would also aid reviewers, to ensure that
some subtle change is not overlooked.]
I don't have an exhaustive list, but the key change that led me to
originally request an update to this RFC can be found in Section 4.3:
4.3. Require Authentication
The MSA MUST issue an error response to the MAIL FROM command if
the
session has not been authenticated using [SMTP-AUTH], unless it has
already independently established authentication or authorization
(such as being within a protected subnetwork).
The idea here is to establish that port 587 submission ALWAYS requires
authentication. By differentiating it in this way from port 25, the
hope is that ISP's who block port 25 will not feel a similar need to
block port 587, thus streamlining the configuration of message
submission for roaming but authenticated users. -- Nathaniel
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