E-mail was the use of computer networks to send and receive messages to others.
The Commandant of the Academy of Carida used e-mails to communicate with cadets. Kyle Katarn received an e-mail stating his father was killed in a Rebel raid.
On board the Star of Empire, Nathan Donar III sent a warning message to Katarn to stay away from Jan Ors, making him realize that his father knew about their Rebel operations.
On board the New Hope, before leaving for the Mission to Danuta, Jan Ors left an e-mail to Katarn, wishing him luck as she had to leave for a new mission and couldn't see him off; Katarn didn't know that Ors's new mission was actually spying on him.
Ace Azzameen frequently used it to keep in touch with certain companies, such as the Alliance Recruiting Center, his compatriots, friends, and family members.
In Dark Forces: Soldier for the Empire Nathan Donar sends an anonymous e-mail to Katarn about Ors that reaches him in his cabin. However, in the audio drama it appears as an eponymous voice call.
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