It Has Been Discovered That the Company Mail Server Is

question 81

Multiple Choice

It has been discovered that the company mail server is configured as an open relay. Which of the following actions would help prevent the mail server from being used as an open relay while maintaining the possibility to receive company mails?

• A) Restrict Postfix to only accept e-mail for domains hosted on this server
• B) Configure Dovecot to support IMAP connectivity
• C) Configure netfilter to not permit port 25 traffic on the public network
• D) Restrict Postfix to only relay outbound SMTP from the internal network
• E) Upgrade the mailbox format from mbox to maildir

---

Definitions:

Depth Perception

The visual ability to perceive the world in three dimensions (3D) and the distance of an object.

Disparity

The condition or fact of being unequal or different; in social sciences, it often refers to inequality in opportunities and treatment among groups of people.

Retinas

The thin layer of tissue at the back of the eye where light is converted into neural signals sent to the brain.

Gestalt Principle

Psychological concepts that describe how humans tend to organize visual elements into groups or unified wholes when perceiving objects.