Data Source: Please refer to footnotes of original report. (Graph: Elydah Joyce, 2016)
This graph originally appeared in You’ve Got Mail: The promise of cyber communication in prisons and the need for regulation.
For two-way electronic messaging systems, both the non-incarcerated and incarcerated users send and receive messages electronically. Note that even the non-incarcerated users must use the provider’s system, not a normal email account.