In addition to their snail-mail block list, the Direct Marketer’s Association also runs an email block list. After providing your email address and responding to their verification, you can opt out of receiving a good chunk of email marketing.

Reputable marketers use this list to filter out consumers who, by dint of registering, are probably going to be pretty unreceptive to their messages. — BEN POPKEN

E-mail Preference Service [DMAConsumers.org] (Thanks to AcilletaM!)

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