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Which of the following is the best reason that this is taking place?

Joyce is a network administrator for a large financial company. She has found out that email messages that her company’s employees are sending out are not getting to their intended destination. Which of the following is the best reason that this is taking place?

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A.
Misconfigured mail relay

B.
Mail servers are whitelisted

C.
Spammers have hijacked the DNS server

D.
Mail servers have gone down

Explanation:
An open relay is an SMTP e-mail server that allows third-party relay of
e-mail messages. By processing mail that is neither for nor from a local user, an
open relay makes it possible for an unscrupulous sender to route large volumes of
spam. Joyce’s company mail servers are misconfigured to act as an open relay and
they got blacklisted.


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