Before this weekend, you'd probably never heard of Epsilon Data Management. But the Texas-based marketing firm had almost certainly heard of you. In fact, the company behind the high-profile leak ...

Epsilon is the world’s largest permission-based e-mail marketer. Other companies, such as Best Buy, use Epsilon to send promotions or other e-mails to their customers. Naturally, the company has ...

Email marketing services company Epsilon’s recent data breach could cost the company as much as $4 billion, according to a worst-case scenario outlined in a recent report.

Customers of as many as 50 firms, including JPMorgan Chase & Co., Kroger Co., TiVo Inc., Best Buy Co., Walgreen Co. and Capital One Financial Corp., found out over the weekend that their email ...