hedisadvantagesofE-mailmainlyconsistofthefollowingaspects：personsmusthaveaccesstotheinternettosendandreceivee-mail;toomanymessages(usuallyspam)canbesenttoausercreatingamailoverflow;E-mailisasourceforcomputerstobecomeinfectedbyviruses;userscannotsendtangibleitemssuchasparcelsbye-mail.
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