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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