Electronic communication (1-4)
'electronic communication' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for e-mail that I've seen before include "Electronic epistle" , "Means of communication" , "Message sent via computer" , "Correspondence sent via internet" , "Messages between computer terminals" .)
'electronic communication' is the definition.
(email is a kind of electronic communication)
This is all the clue.
(Other definitions for email that I've seen before include "Messages between computer terminals" , "Spam perhaps" , "Send one online" , "Message sent via computer" , "Digital message" .)