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The rapid growth of phishing attacks has raised serious concerns as the attackers are trying to steal confidential financial and payment details of the organization and business for cyberattacks. To stop the misuse of confidential data, unauthorized access, and cyber fraud, the Payment Card Industry Data Security Standard (PCI DSS 4.0) has set a compliance deadline of March 31, 2025, for mandatory DMARC (Domain-based Message Authentication, Reporting & Conformance) implementation.
This mandatory compliance aims to mitigate the risks of email fraud, domain spoofing, and phishing attacks, which pose significant threats to businesses handling cardholder data or processing payments. This requirement applies to all businesses and organizations that handle or process cardholder data.
In this blog, we will be discussing the PCI DSS and understanding the need to ensure PCI DSS compliance to protect against cyber fraud and unauthorized access.
What is PCI DSS?
PCI DSS stands for Payment Card Industry Data Security Standard. It is designed in such a way that it protects cardholder data. These requirements were developed to secure systems that store, transmit and process cardholder data with requirements for encryption, Firewalls, and Access Controls.
The rapid growth of phishing attacks that aim to get confidential payment details has raised the need for strong email security measures which is a key part of PCI DSS. To fulfill such needs, DMARC, which is part of PCI DSS volume 4, has been made mandatory for enhanced compliance and email security to reduce payments fraud.
Industries Impacted by PCI DSS 4.0 Email Security Rules
- Financial Services (banks, payment process).
- E-commerce and Retail (online stores).
- Hospitality and Travel (hotels, airlines).
- Healthcare (hospitals, clinics).
- Technology and SaaS (subscription platforms).
- Telecommunications (billing systems).
- Government and Public Sector (citizen payments).
- Education (tuition payments).
- Manufacturing and Supply Chain (vendor payments).
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Why Does PCI DSS Require DMARC?
It requires DMARC as email is an important communication channel for businesses. Also, one of the top targets for cybercriminals. Email attacks like phishing and spoofing can lead to major massive data breaches which can affect business reputations and lead to high financial losses. In the latest version, PCI DSS 4.0 focuses on securing the email communication channel and protecting systems from malware which are delivered through phishing Attacks.
Understanding DMARC: How It Works
DMARC (Domain-based Message Authentication, Reporting & Conformance) helps to ensure only legitimate emails are sent from your domain. It helps to protect from spoofing attacks and phishing attempts. This is the main reason why PCI DSS emphasizes the importance of DMARC for the protection of cardholder data.
DMARC works on two security protocols
- SPF (Sender Policy Framework): It helps to whitelist legitimate IPs and allows them to send emails on behalf of your domain.
- DKIM (Domain Keys Identified Mail ): The purpose of DKIM is to ensure that emails are not tampered with and protect the integrity of email content.
DMARC tries to integrate these two security protocols together and allows the domain owner to set a policy on how to handle unauthorized emails.
5 Steps for Implementing DMARC for PCI DSS
Following are the 5 steps for implementing DMARC for PCI DSS
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Creation of DMARC Record
There is a need to establish a DMARC record for the domain in which you want the email handling process.
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Configuring Mail Servers
Now, ensure the mail server recognizes and enforces the DMARC policy.
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Monitoring of reports
Review the DMARC regularly to identify and address the issues.
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Policy Settings
For non-compliant emails, set DMARC policy to “reject” or “quarantine”.
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Continuous Improvement
Updating and refining DMARC settings based on report insights.
How Threatcop’s TDMARC Helps to Achieve Compliance
Using TDMARC’s email authentication and security solutions will help organizations to protect outbound email workflow from spoofing and phishing attempts. The following are features of TDMARC that will help to achieve compliance.
- Real-time notifications: It helps to alert administrators of unauthorized email activities, enabling swift action against modern cyber threats
- Lookalike Domain Visibility: Detects and mitigates spoofed domains to prevent impersonation attacks.
- MTA-STS secures email transport against man-in-the-middle attacks, ensuring encrypted and authenticated email delivery.
- Blacklist IP Monitoring helps to identify and mitigate potential threats.
- SIEM integration enhances security monitoring and incident response by providing seamless data flow to security systems.
- Smart DMARC and Smart SPF provide advanced email authentication to prevent spoofing and phishing attacks.
- Smart BIMI strengthens brand trust by displaying verified logos in email clients.
Conclusion
For protecting customers and clients from phishing and data breaches and building trust in the payment ecosystem, DMARC is a necessary component for PCI DSS compliance. By March 2025, the deadline for this is approaching, so organizations need to act now to secure confidential details and stay protected from modern email threats. To solve this issue organizations can adopt Threatcop’s TDMARC to meet PCI DSS 4.0 requirements and strengthen email security for modern needs.
Technical Content Writer at Threatcop
Milind Udbhav is a cybersecurity researcher and technology enthusiast. As a Technical Content Writer at Threatcop, he uses his research experience to create informative content which helps audience to understand core concepts easily.