[Sipping] New draft related to spam prevention

[Ron Shacham <rs2194 at columbia.edu>]

We have submitted a draft that describes an HTTP header for carrying 
correspondence addresses from a server.  These addresses are the ones that 
will be used for confirmations, advertisements, follow-ups, etc. following 
an online transaction.  This facilitates the inclusion of such addresses 
in whitelists for email filtering, even though the user never sends to 
them.  This is, of course, also applicable to the sip spam problem
(hence the message to this list).  We'd appreciate comments.

Regards,
Ron


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