Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Email Authentication Mechanisms: DMARC, SPF and DKIM

Published

Author(s)

J. S. Nightingale

Abstract

In recent years the IETF has been making a range of efforts to secure the email infrastructure and its use. Infrastructure protection includes source authentication by RFC 7208 Sender Policy Framework (SPF), message integrity authentication by RFC 6376 Domain Keys Identified Mail (DKIM), and domain owner feedback on the effectiveness of these methods by RFC 7489 Domain- based Message Authentication, Reporting and Conformance (DMARC). The High Assurance Domains (HAD) secure email project at NIST has been supporting the development of these initiatives by developing and deploying test infrastructure. This report describes our cumulative experiences with a test system for DMARC and its related protocols.
Citation
Technical Note (NIST TN) - 1945
Report Number
1945

Keywords

DMARC, DKIM, SPF, DNS, email, SMTP
Created February 16, 2017, Updated November 10, 2018