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Dial in to an ISP (Internet Service Provider) -
other than the University of Maryland.
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Use a machine on a network - other than the
University of Maryland.
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You can receive email, but you can no longer send email to
non-University of Maryland email addresses. You may receive
an error message including the phrase,
"
Relaying Denied." Or, your
mail bounces, giving the reason:
----- Transcript of session follows -----
.. while talking to . . . .
>>> 550 relaying denied
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