SPF (sender policy framework)
All > Technology > E-mail > Microsoft Email > Microsoft Exchange > Microsoft Exchange 2007
- An extension of the SMTP protocol that prevents spammers from forging the From: fields in e-mail messages by verifying that the IP address in the SMTP Received: header is authorized to send e-mail for the sender's domain. [Exchange 2007]
Microsoft - Cite This Source - This Definition - Message Header, SMTP (Simple Mail Transfer Protocol), TCP (Transmission Control Protocol), UDP (user datagram protocol), X-header