Question

What email validation system is designed to stop spam that uses source address spoofing?

a) Foremost Relay System
b) Sender Policy Framework
c) Spam Checking Networking
d) Spoof Checker

Answer 1

The email validation system designed to stop spam by confirming the legitimacy of the sender's address is the Sender Policy Framework (SPF). It compares the sender's IP against authorized IPs in the DNS records of the sending domain.

Step-by-step explanation:

The email validation system designed to stop spam by preventing source address spoofing is known as the Sender Policy Framework (SPF). SPF is a method used to validate that incoming mail from a domain is being sent from a host authorized by that domain's administrators. It does this by comparing the sending mail server's IP address with a list of IPs authorized to send mail for that domain, which is published in the domain's DNS records. If the sender's IP is not on the list, the email can be considered unauthorized or possibly spam, allowing the receiving server to reject or flag the message accordingly.