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.

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

  • compliance as a service (CaaS)

    Compliance as a Service (CaaS) is a cloud service service level agreement (SLA) that specified how a managed service provider (...

  • data protection impact assessment (DPIA)

    A data protection impact assessment (DPIA) is a process designed to help organizations determine how data processing systems, ...

SearchSecurity

  • quantum key distribution (QKD)

    Quantum key distribution (QKD) is a secure communication method for exchanging encryption keys only known between shared parties.

  • identity theft

    Identity theft, also known as identity fraud, is a crime in which an imposter obtains key pieces of personally identifiable ...

  • cybercrime

    Cybercrime is any criminal activity that involves a computer, networked device or a network.

SearchHealthIT

SearchDisasterRecovery

  • disaster recovery plan (DRP)

    A disaster recovery plan (DRP) is a documented, structured approach that describes how an organization can quickly resume work ...

  • business continuity plan (BCP)

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

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

SearchStorage

  • logical unit number (LUN)

    A logical unit number (LUN) is a unique identifier for designating an individual or collection of physical or virtual storage ...

  • NVMe over Fabrics (NVMe-oF)

    NVMe over Fabrics, also known as NVMe-oF and non-volatile memory express over fabrics, is a protocol specification designed to ...

  • CIFS (Common Internet File System)

    CIFS (Common Internet File System) is a protocol that gained popularity around the year 2000, as vendors worked to establish an ...

Close