A do-not-spam registry that might work

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Rob writes “Blue Security Inc has come up with a novel twist on the do-not-call registry to fight
spam that seems to address many of the problems inherent to previous attempts.  Blue
chief executive Eran Reshef told Computer Business Review that the system is ethical, hard for spammers to
evade, and does not allow spammers to farm the list for email addresses, which
has been the major drawback of previous notional do-not-spam registries
.”

Link: cbronline.com