With the growing use of digital communication—email, instant messaging, text messaging, etc.—there has become a growing incidence of digital relationships. The term E-Friend is often used to describe these relationships.
It has a variety of applications; it is frequently used to mean any kind relationship occurring with the aid of cell phones, personal digital assistants, instant messaging services or email.
It may appear in sms (short message service) as efrnd.
"I have friends, they're E-Friends, just because I've never met them doesn't mean they're not friends!"
Taken from Friendster profile
"She doesn't mean anything to me, she's just an efriend."