Sender Policy Framework (SPF) is an email validation system designed to prevent email spam by detecting email spoofing, a common vulnerability, by verifying sender IP addresses. SPF allows administrators to specify which hosts are allowed to send mail from a given domain by creating a specific SPF record (or TXT record) in the Domain Name System (DNS). Mail exchangers use the DNS to check that mail from a given domain is being sent by a host sanctioned by that domain's administrators.
Sender Policy Framework is defined in IETF publication RFC 4408.
Read more about Sender Policy Framework: Principles of Operation, Implementation, History, Controversy, Deployment
Famous quotes containing the words sender, policy and/or framework:
“Love that comes too late,
Like a remorseful pardon slowly carried,
To the great sender turns a sour offense,
Crying, “That’s good that’s gone.””
—William Shakespeare (1564–1616)
“Letting a hundred flowers blossom and a hundred schools of thought contend is the policy for promoting the progress of the arts and the sciences and a flourishing culture in our land.”
—Mao Zedong (1893–1976)
“The city is a fact in nature, like a cave, a run of mackerel or an ant-heap. But it is also a conscious work of art, and it holds within its communal framework many simpler and more personal forms of art. Mind takes form in the city; and in turn, urban forms condition mind.”
—Lewis Mumford (1895–1990)