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

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Definitions:

Squared Horizontal Deviations

The squared differences between each value in a set of values and a chosen fixed point, typically used in the context of variance or standard deviation calculations.

Sample Points

Individual items or observations selected from a population for the purpose of statistical analysis.

Three-variable

Pertaining to equations, models, or analyses that involve three distinct variables or elements.

Estimated Regression Model

A statistical model that estimates the relationship between a dependent variable and one or more independent variables, often used to predict outcomes or understand the influence of variables.