When configuring a new server, a technician requests that an MX record be created in DNS for the new server, but the record was not entered properly. Which of the following was MOST likely installed that required an MX record to function properly?

When entering new information into a field, the record selector displays a hand with a finger pointing to the current record being entered

Indicate whether the statement is true or false

Which of the following default port numbers need to be open on a firewall for a mail server to successfully send and receive mail? (Choose three.)

A. 22 B. 25 C. 53 D. 80 E. 110 F. 143 G. 161