SPF, which abbreviates Sender Policy Framework, is a verification system that aims at stopping the so-called email faking. Essentially, this indicates sending a message from one email address and making it look like it’s sent from a different one with the purpose to scam in some manner the individual getting it. If the SPF protection is activated for a domain name, a record which contains all of the mail servers authorized to send messages with addresses part of the domain is made. The record is stored on all the DNS servers that route the web traffic across the globe, so they all can recognize whether an e-mail message originates from a trustworthy server or not. The verification is done at the very first server where the email goes through and in the first case the e-mail message is forwarded, and in the second one it is discarded and it never reaches the supposed recipient. Employing SPF records for your domains will prevent all unauthorized people from using your emails for harmful purposes.