Go back to 117-102 - LPI Level 1 Exam 102

Question :-

To avoid spammers using your mail server to relay their messages, you need to _______.
Disable the relay control in /etc/aliases
Set up a ruleset for this in /etc/sendmail.cf
Set up relay control in your DNS's MX record.
Recompile sendmail with the ­NORELAY flag.

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