This has been discussed before. While its a great idea, to send out a mailing list would cost the same amount. Then theres the whitelist, which could eliminate the mailing list problem, but there are inherent problems with whitelists (ie spammer worm adding all the spammers to the whitelist, etc...)
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This has been discussed before. While its a great idea, to send out a mailing list would cost the same amount. Then theres the whitelist, which could eliminate the mailing list problem, but there are inherent problems with whitelists (ie spammer worm adding all the spammers to the whitelist, etc...)