The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2025
Filed:
Oct. 14, 2022
Fraudmarc Inc., Atlanta, GA (US);
Keith Wayne Coleman, Atlanta, GA (US);
Richard Duncan, Atlanta, GA (US);
Fraudmarc Inc., Atlanta, GA (US);
Abstract
Sender Policy Framework (SPF) is a widely used method of distinguishing authorized email from unauthorized email. SPF policies are published into a domain's DNS and then looked up and evaluated by mail receivers. Due to the complexity and limitations of the SPF specification, implementation mistakes and risks are widespread. Embodiments of the present disclosure enable new SPF techniques such as creating a top layer SPF policy for dividing addresses into categories, and multiple second layer SPF policies for identifying IP addresses corresponding to each category. One of the second layer policies is selected as a default policy, such that any IP address that does not correspond to any other of the second layer SPF policies will match the default policy.