SPF, which is an abbreviation for Sender Policy Framework, is a validation system that aims at stopping the so-called e-mail forging. Basically, this indicates sending some message from one email and making it seem to be sent from another one with the purpose to scam in some manner the person opening it. If the SPF protection is running for a domain, a record that includes all mail servers authorized to email messages with addresses in the domain is generated. The record is saved on all of the DNS servers that direct the web traffic across the globe, therefore they all can recognize whether an e-mail message comes from a trustworthy server or not. The verification is conducted at the first server where the e-mail goes through and in the first case the message is forwarded, while 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 making use of your email addresses for malicious objectives.