Shop Talk: Tips for Confirming Email Sign-Ups

DO have a clear opt-out message on the bottom of every email. Don't bury your unsubscribe message in two-point, reverse type font. Make it clear and easy for users to get off your list should they so desire.

DO offer a preferences center where users can update their information, specify the topic(s) they're interested in and/or designate how frequently they'd like to hear from you.