SPF, which is an abbreviation for Sender Policy Framework, is a verification system that aims at stopping the so-called email counterfeiting. Essentially, this indicates sending some message from one email and making it seem to be sent from another one with the idea to scam in some manner the individual receiving it. If the SPF protection is activated for a domain name, a record which includes all of the mail servers authorized to email messages with addresses within the domain is created. The record is saved on all of the DNS servers that direct the web traffic globally, so they all will identify whether an e-mail message originates from a legitimate server or not. The verification is conducted at the very first server where the e-mail goes through and in the first case the email message is forwarded, and in the second one it is removed and it never gets to its intended recipient. Using SPF records for your domain names will stop any unwanted people from making use of your emails for harmful purposes.