ThirdLove is an American lingerie company founded by Heidi Zak and her husband David Spector in 2013. The brand is known for marketing body positivity and offering size-inclusive bras.
ThirdLove uses intelligent direct mail to re-engage customers who have unsubscribed from its email list. ThirdLove uses direct mail postcards personalized based on a customer's prior purchase history in its automated reactivation campaign. The campaigns produce some of the highest response rates of any campaigns ThirdLove sends.

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