Browse Definitions:
Definition

Domain-based Message Authentication, Reporting and Conformance (DMARC)

Contributor(s): Matthew Haughn

Domain-based Message Authentication, Reporting and Conformance (DMARC) is an email authentication and reporting protocol designed to help ensure the authenticity of the sender’s identity.

DMARC protects email from spoofing, phishing and spamming. The protocol helps make certain that the listed sender is who they are supposed to be, making email users more secure and protecting brands against abuse of their images.

DMARC builds on the commonly-deployed Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM) protocols. DMARC adds linkage to the author’s domain name with the :From: header and standardized policies for recipient handling of authentication failures. Receivers-to-sender reporting is improved for anti-spam purposes.

A policy for DMARC allows a sender domain to specify if its email’s use of SPF and/or DKIM. Policies can be set for sending email to a spam folder or reject it if the authentication methods fail. If an email recipient gets an email that fails these authentications, they also have an option to report it back to the sending domain.

DMARC only protects against direct domain spoofing. Users can still be fooled by similar domains that trick them by appearing close enough, e.g. domainname.com vs domaimename.com. The protocol also fails to protect against situations where the sender is faked as the same name as the recipient. Despite limitations, DMARC’s additional protections were welcomed. Within a year of its debut in 2012, DMARC was deployed on 60 percent of email inboxes.

This was last updated in November 2017

Continue Reading About Domain-based Message Authentication, Reporting and Conformance (DMARC)

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • risk map (risk heat map)

    A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces.

  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

  • pure risk (absolute risk)

    Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...

SearchSecurity

  • FIDO (Fast Identity Online)

    FIDO (Fast ID Online) is a set of technology-agnostic security specifications for strong authentication. FIDO is developed by the...

  • cryptanalysis

    Cryptanalysis is the study of ciphertext, ciphers and cryptosystems with the aim of understanding how they work and finding and ...

  • Trojan horse (computing)

    In computing, a Trojan horse is a program that appears harmless, but is, in fact, malicious.

SearchHealthIT

SearchDisasterRecovery

  • business continuity and disaster recovery (BCDR)

    Business continuity and disaster recovery (BCDR) are closely related practices that describe an organization's preparation for ...

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • call tree

    A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...

SearchStorage

  • SSD TRIM

    SSD TRIM is an Advanced Technology Attachment (ATA) command that enables an operating system to inform a NAND flash solid-state ...

  • cloud storage service

    A cloud storage service is a business that maintains and manages its customers' data and makes that data accessible over a ...

  • cloud hosting

    Cloud hosting is the process of outsourcing an organization's computing and storage resources to a service provider that offers ...

SearchSolidStateStorage

  • hybrid hard disk drive (HDD)

    A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.

Close