[ietf-dkim] Re: A proposal for restructuring SSP

[Frank Ellermann]

Jeff Macdonald wrote:
 
> would this be a 5.7.x enhanced status code?

http://tools.ietf.org/html/draft-hansen-4468upd-mailesc-registry
notes that X.7.1 is associated with 550 pointing to RFC 3463 for
the details:

| X.7.1   Delivery not authorized, message refused
| The sender is not authorized to send to the destination.  This
| can be the result of per-host or per-recipient filtering.  This
| memo does not discuss the merits of any such filtering, but
| provides a mechanism to report such.  This is useful only as a
| permanent error.

5.7.0 is apparently too unspecific.  In theory SSP could create
its own 5.7.x if the eight existing codes are not good enough:
http://tools.ietf.org/html/rfc3463#section-3.8

 Frank