E-mail — Messages sent from one person to another, or to a large group of people, through a computer network or the internet.

Education — A source of compiled lists of educators, librarians, coaches, students, etc.

EDT — Electronic Data Transfer: Transmitting information over a network.

Ethnic lists — Lists sorted by surname into supposed ethnic groups.

Exact date of birth — See Date of birth.

Exchange — A list swap between mail order companies, to cross-sell like products to each others' lists.

Expires — People who have made a purchase in the past but not within the time period the list owners consider "active;" also, subscribers who have not renewed their subscription.