As Steve says the list-unsubscribe header works about as well as what
you are suggesting .. if an ISP actually decides they want to
implement this across the board and trust any list unsubscribe header
that comes their way. Which is not particularly recommended.
You typically contact an ISP out of band to apply for an FBL and
whitelisting. And there is some crosschecking done before the FBL is
set up.
On Wed, May 27, 2009 at 4:06 AM, Franck Martin <franck(_at_)genius(_dot_)com>
wrote:
I'm curious to see if the feedback loop mechanism could be extended using
DKIM. The concept may have many issues, but I want to see if it is a stupid
idea, or if it would have some merit.
The system would be for the sender to include in the dkim mechanism an
FBL-email: header wich would tell the receiving mail system where to send an
ARF email if the recipient hit the spam button.
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