Sender Policy Framework, or SPF, is a validation system, that is designed 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 another one, typically with the purpose to fraud the recipient for some reason. If SPF protection is enabled for a domain
, a unique record is created for it in the Domain Name System and all DNS servers globally receive it. The record features all e-mail servers that are allowed to send authentic messages from an address under the domain. When a message is sent, the very first DNS server it encounters checks the SPF record and when its sending server is authorized, the message is forwarded to the targeted receiver. If, however, the sending server is not included in the SPF record for the specified domain, the e-mail message will not be submitted and it will be removed. When you employ this service, it will prevent third parties from sending spam which seem to have been sent from you.