A new firewall was installed and a customer reports that they can receive email but cannot send email. Which of the following protocols is being blocked?

The correct answer is C. SMTP. See the full explanation below for the reasoning.

Question

A new firewall was installed and a customer reports that they can receive email but cannot send email. Which of the following protocols is being blocked?

Options

ASNMP
BIMAP
CSMTP
DPOP3

How the community answered

(54 responses)

A
7% (4)
B
4% (2)
C
72% (39)
D
17% (9)

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