What is Epsilon?

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 access to a lot of e-mail addresses.

What happened?

On March 30, an unauthorized party gained entry into Epsilon's system and accessed e-mails and customer names for a subset of Epsilon clients. If you're a customer of one of these clients, there's a chance that some hacker now knows your name and e-mail address.

Who is affected?