Refer to the exhibit.

When SMTP messages are being blocked by a firewall, which of the following implementations can
be performed on Cisco Unity Connection to rectify this issue?

A.
Ensure that messages can be sent in MIME format in Cisco Unity Connection.

B.
Change the SMTP port number to match those ports that are used for the audio.

C.
Configure an SMTP smart host, where all SMTP traffic can be sent

D.
There are no workarounds to this problem

Explanation:
Reference, Student Book 4-32 (Vol. 2)