For making decisions on the dot, See: http://tools.ietf.org/html/draft-otis-dkim-tpa-label-06
ADSP was initially focused on mitigating phishing attacks. Unfortunately, ADSP had a negative impact on informal third-party mail services being used by targeted domains. The stalwart alternative to the ADSP proactive scheme, reputation services, are unable to keep pace with the dynamic environment created by criminals profiting from their deceptive activities. So rather than asking a reputation service about the message source, or asking a vouching service about what the Author Domain should have entered into their ADSP record, why not directly ask the Author Domain about the source. After all, the Author Domain has a vested interest in guiding their recipients in what sources should be accepted even when the Author Domain Signature is no longer valid. The Author Domain is able to indicate whether the source domain is authorized and how the recipient should be able to authenticate this source. All of this information is contained within a simple single DNS transaction. -Doug _______________________________________________ NOTE WELL: This list operates according to http://mipassoc.org/dkim/ietf-list-rules.html