I was talking to a group of friends the other day, and the topic of discussion turned to the term "Permission Marketing." How useless it is as a measure of best practices. Every ESP (email service provider) or direct sender uses the term, making it entirely neutral as a measure of whether or not a company is a spammer, or if they're a provider that would allow spammers on their network.
DKIM and DomainKeys, Spam and Ham
17 hours ago