Sender Policy Framework, or SPF, is a verification system, which is employed to stop the so-called e-mail spoofing where an e-mail message is sent from one email, but to appear as being sent from a different, frequently with the idea to fraud the recipient in some way. When SPF protection is enabled for a domain name, a specific record is made for it in the Domain Name System and all DNS servers around the world receive it. The record includes all the email servers that are permitted to send valid messages from an address part of the domain. When a message is sent, the first DNS server it encounters verifies the SPF record and in case the sending server is authorized, the message is sent to the target receiver. If, however, the sending server is not included in the SPF record for the specified domain, the e-mail message will not be sent and it will be discarded. When you employ this solution, it will prevent third parties from sending spam emails which appear to have been sent from you.