DMARC (Domain-based Message Authentication, Reporting & Conformance) is an email authentication protocol, which includes a reporting function that allows senders and receivers to improve and monitor protection of the domain from fraudulent email. Implementation of DMARC will prevent Spammers from spoofing the “From” address on mail messages. Depending on the DMARC policy settings, any mail messages originating from an unauthorized mail server will be either quarantined or rejected.
DMARC builds upon the existing authentication protocols: Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM).
For more information about and resources for DMARC implementation, see the links below.
- DMARC.IO hosts a directory of sources, forwarders, data providers, and technology suppliers… all related to the deployment and operation of DMARC.
- What is DMARC – https://www.dmarcanalyzer.com/dmarc/
- What is a DMARC record – https://www.dmarcanalyzer.com/dmarc/dmarc-record/
- How to Create a DMARC record – https://www.dmarcanalyzer.com/how-to-create-a-dmarc-record/
- DMARC in Practice – https://www.dmarcanalyzer.com/dmarc/#dmarc-in-practice
- 5 Common Mistakes when deploying DMARC – https://www.dmarcanalyzer.com/common-mistakes-deploying-dmarc/
- Start deploying DMARC in 5 easy steps – https://www.dmarcanalyzer.com/start-deploying-dmarc-5-easy-steps/
- DMARC Deployment workflow within DMARC Analyzer – https://www.dmarcanalyzer.com/dmarc-deployment-workflow/
- Google: About DMARC
- InMotion Hosting: How to Setup DMARC Records in cPanel
- Kitterman Technical Services: DMARC Record Assistant
- Microsoft: Use DMARC to Validate Email in Office 365
- National Cyber Security Centre: Open Sourcing MailCheck