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. This would provide a mechanism similar to FBL but allowing small receiving mail systems to participate. I think some stats show that 30% of people hitting the spam button, really means, unsubscribe me from this mailing list. Also, mail footers with remove links, are either not read or are not trusted by the recipient, I think, it is safer to hit the spam button, than to click on the links. By sigining the FBL-email: header it would give a certain level of trust, that there is a mailbox at this address and that the mailbox has been set to process ARF emails. The FBL-header must be DKIM validated, otherwise it would not be helpful at all.
_______________________________________________ NOTE WELL: This list operates according to http://mipassoc.org/dkim/ietf-list-rules.html
