[Asrg] Consent in IM

The IETF WGs working on instant messaging protocols (IMPP and XMPP) have 
incorporated the notion of consent into their protocols. For example see 
this quote from RFC 2779:

---snip--
"The PRINCIPAL controlling an INSTANT INBOX MUST be able to control
       -- (2.3.5) which other PRINCIPALS, if any, can send INSTANT
          MESSAGES to that INSTANT INBOX.
"
---snip--

The XMPP draft 
(http://www.ietf.org/internet-drafts/draft-ietf-xmpp-im-13.txt), section 8, 
has an extensive discussion blocking messages including the following:

---snip---
o  Retrieving one's privacy lists.
o  Adding, removing, and editing one's privacy lists.
o  Setting, changing, or declining active lists.
o  Setting, changing, or declining the default list (i.e., the list that is 
active by default).
o  Allowing or denying messages based on JID, group, or subscription type 
(or globally).
o  Allowing or denying inbound presence notifications based on JID, group, 
or subscription type (or globally).
o  Allowing or denying outbound presence notifications based on JID, group, 
or subscription type (or globally).
o  Allowing or denying IQs based on JID, group, or subscription type (or 
globally).
o  Allowing or denying all communications based on JID, group, or 
subscription type (or globally).
---snip---

Would looking at the way consent is implemented in IM help us with defining 
a consent framework for email?

Yakov 

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