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SPF

   Also found in: Dictionary/thesaurus, Medical, Acronyms, Wikipedia, Hutchinson 0.04 sec.

SPF

(1) (Stateful Packet Firewall) See stateful inspection.

(2) (Sender Policy Framework) An e-mail authentication system that verifies that the message came from an authorized mail server. SPF is designed to detect messages from spammers and phishers who falsify the sender's IP address in the e-mail header. SPF is an extension to the SMTP mail protocol.

SPF Records
The DNS system identifies the IP address of a receiving mail server with a line of text in the DNS database known as an MX record. DNS also supports a "reverse MX" record, which identifies the sending mail server and is used by SPF. When an e-mail message is received, the mail server checks the SPF record in the DNS to see if it matches the actual IP address of the message. If it does, the e-mail is considered valid. For more information, visit www.spf.pobox.com.

SPF Classic and PRA
There are two approaches to checking e-mail messages via SPF. SPF Classic systems check only the envelope header, while Microsoft's Purported Responsible Address (PRA) method looks at the headers within the message. See Sender ID, Joe Job, spam, phishing, throwaway domain and SMTP.



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The SPF dimensional sawmill is located in Dubreuilville, 310 kilometres north of Sault Ste.
Dubreuil Forest suspends operation by Northern Ontario Business
At the 1996 SPF terrorist gathering in El Salvador, Angela Sanbrano led a discussion on immigration entitled "Solidarity Without Borders" Sounding like an early proponent of the Bush administration's Security and Prosperity Partnership, she told her comrades:
White House, GOP, Dems Court La Raza Radicals by The New American
So avoid going back to the lodge looking like a lobster with a bottle of Malin+Goetz sunscreen with SPF 30 for face and body protection, $16.
Ski weekend! by The Advocate (The national gay & lesbian newsmagazine)
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