SPF, which abbreviates Sender Policy Framework, is a verification system that aims at protecting against the so-called email counterfeiting. In simple terms, this indicates sending a message from one e-mail address and making it seem to be sent from a different one with the idea to scam in some manner the person opening it. In the event that the SPF protection is active for a domain name, a record that contains all the mail servers authorized to send messages with addresses within the domain is made. The record is saved on all the DNS servers that direct the web traffic around the world, so that they all can recognize whether an email message originates from an authentic server or not. The check is conducted at the first server where the email goes through and in the first case the e-mail message is forwarded, while in the second one it is discarded and it never gets to the supposed recipient. Employing SPF records for your domain names will stop any unauthorized people from using your email addresses for malicious objectives.