You are the cybersecurity lead at a large corporation. Recently, your organization has been experiencing an increase in SMTP$-$based attacks such as open relay, DDoS, and spam attacks. You need to devise a strategy to not only mitigate these attacks but also gather information about the attackers' tactics.

Which of the following would be the BEST solution?

answer

Regularly change the email server's IP address to confuse the attackers.

Set up an email honeypot designed to attract and trap these types of attacks.

Shut down the email server until the attacks cease.

Implement a strong firewall and block all SMTP traffic.