Watchguard Network Security Practice Test

What characteristics can the SMTP-proxy policy use to restrict email messages and content?

1. Sender Mail From address

2. Check URLs in message with WebBlocker

3. Email message size

4. Attachment file name and content type

The correct answer is: Sender Mail From address

The SMTP-proxy policy is designed to filter and control email traffic effectively to enhance security and manage content. One of the critical characteristics that this policy can use to restrict email messages and content is the Sender Mail From address. By examining the sender's email address, the SMTP proxy can determine whether to allow or block incoming and outgoing emails based on predefined rules. Using the Sender Mail From address for restrictions can help organizations filter spam, phishing attempts, or any unauthorized communications by allowing only addresses from trusted domains or specific individuals. This approach provides a proactive means of safeguarding the network against unwanted or harmful email traffic, enabling the organization to maintain a higher level of security. While other options like checking URLs in messages, email message size, and attachment file name and content type are also important in an email security context, the specific ability of the SMTP-proxy to use the Sender Mail From address directly correlates to filtering decisions based on the identity of the sender, which is crucial in mitigating risks associated with email communications.