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Card Technology LLC

Email is a vital communication medium that is used by every business around the globe. Email is also one of the primary attack vectors that can introduce malware, ransomware and other malicious code into your environment. These attacks can come in many forms including email spoofing.

DMARC is designed to help mitigate this risk and ensure that spoofing your company domain is identified and blocked, including communication targeted at your organization or customers.

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Email is a vital communication medium that is used by every business around the globe. Email is also one of the primary attack vectors that can introduce malware, ransomware and other malicious code into your environment. These attacks can come in many forms including email spoofing.

DMARC is designed to help mitigate this risk and ensure that spoofing your company domain is identified and blocked, including communication targeted at your organization or customers.

DMARC standards for Domain Based Message Authentication, Reporting and Conformance. DMARC utilizes both SPF and DKIM in order to make a determination on how to handle email that is coming inbound to your organization as well as messages that are sent outbound from your domain.

SPF stands for sender policy framework, and this specifies the servers that are allowed to send email on your behalf.

DKIM is an acronym for Domain Keys Identified Mail. This allows your mail server to digitally sign each message that is sent out from your domain. The recipient can then verify that the email was sent from your server and has not been altered in transit.

This course will help you understand the fundamental concepts of these three protocols and how they work in conjunction with each other to help mitigate the risk of email spoofing from your domain.

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What's inside

Learning objectives

  • Email security
  • Spf - sender policy framework
  • Dkim - domainkeys identified mail
  • Dmarc - domain-based message authentication, reporting & conformance

Syllabus

DMARC Fundamentals
Introduction
SPF - Sender Policy Framework
DKIM - DomainKeys Identified Mail
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Activities

Coming soon We're preparing activities for DMARC Fundamentals. These are activities you can do either before, during, or after a course.

Career center

Learners who complete DMARC Fundamentals will develop knowledge and skills that may be useful to these careers:
Email Security Engineer
An Email Security Engineer is a professional dedicated to protecting an organization's email infrastructure from various threats, including spam, phishing, and malware. This role involves designing, implementing, and managing email security systems and policies. The DMARC Fundamentals course directly addresses the core responsibilities of an Email Security Engineer by providing a deep understanding of DMARC, SPF, and DKIM protocols. These are essential for authenticating email senders, verifying message integrity, and mitigating email spoofing, a primary attack vector. This course helps one to build the expertise needed to configure, monitor, and troubleshoot complex email authentication systems, ensuring secure email communication for any organization.
Cybersecurity Analyst
As a Cybersecurity Analyst, you work to protect an organization's information systems from cyber threats, detecting vulnerabilities, and responding to incidents. Email is frequently exploited as an initial attack vector for malware, ransomware, and phishing campaigns. The DMARC Fundamentals course helps a Cybersecurity Analyst understand email authentication protocols such as DMARC, SPF, and DKIM, which are crucial for identifying legitimate email from malicious spoofed messages. This knowledge is instrumental in developing threat intelligence, assessing security postures, and formulating effective incident response strategies to counteract email-borne attacks and secure vital communication channels.
Security Operations Center Analyst
A Security Operations Center Analyst monitors security systems, detects incidents, and responds to threats in real time. Given that email is a primary conduit for cyberattacks, understanding email security is paramount. The DMARC Fundamentals course equips a Security Operations Center Analyst with essential knowledge of DMARC, SPF, and DKIM, which are critical for recognizing and blocking spoofed emails and other malicious communications. This understanding helps in analyzing security alerts, triaging potential email-based threats, and implementing rapid containment strategies, thereby enhancing an organization's ability to defend against sophisticated email attacks.
Information Security Specialist
An Information Security Specialist is responsible for developing, implementing, and maintaining an organization's comprehensive security policies and systems. Email security forms a critical component of overall information security posture, as email remains a ubiquitous communication tool and a significant attack surface. The DMARC Fundamentals course provides the foundational understanding of DMARC, SPF, and DKIM protocols vital for an Information Security Specialist. This enables the effective design and deployment of defenses against email spoofing, ransomware, and other malicious email activities, contributing to a robust security framework that protects an organization's data and assets.
IT Security Administrator
An IT Security Administrator manages and maintains an organization's IT security infrastructure, encompassing hardware, software, and networks. This includes configuring and overseeing security systems that protect email communication. The DMARC Fundamentals course offers practical knowledge of DMARC, SPF, and DKIM, which are essential for an IT Security Administrator to implement robust email authentication mechanisms. This expertise helps in preventing email spoofing, securing inbound and outbound email traffic, and ensuring compliance with security best practices, ultimately safeguarding the organization from email-borne threats and maintaining operational integrity.
Security Consultant
As a Security Consultant, you advise organizations on their cybersecurity risks and recommend tailored security solutions. Expertise in email security protocols like DMARC, SPF, and DKIM is crucial for assessing client vulnerabilities and proposing effective defenses against common attack vectors such as email spoofing and phishing. The DMARC Fundamentals course provides a comprehensive understanding of how these protocols work in conjunction to mitigate risks. This knowledge helps a Security Consultant to educate clients on email security best practices, design resilient email infrastructures, and guide them in implementing strategies that enhance their overall security posture.
Security Architect
A Security Architect designs and builds secure systems and infrastructure, developing high-level security strategies and frameworks. Email security is a critical layer in any organizational architecture, directly impacting overall resilience against cyber threats. The DMARC Fundamentals course offers crucial insights into DMARC, SPF, and DKIM, which allow a Security Architect to design robust email authentication and anti-spoofing mechanisms. This understanding aids in architecting secure email gateways, integrating security protocols into network design, and ensuring that email communication channels are protected against malicious code and unauthorized access from the ground up.
Incident Response Specialist
An Incident Response Specialist is at the forefront of managing and mitigating security breaches, working to contain, eradicate, and recover from cyberattacks. Many incidents originate from email, often involving spoofed messages or malicious attachments. The DMARC Fundamentals course provides a valuable understanding of how DMARC, SPF, and DKIM protocols function. This knowledge helps an Incident Response Specialist to analyze email headers, trace the origin of suspicious emails, and determine if an email-based attack exploited authentication weaknesses. It helps in formulating effective containment strategies and in post-incident analysis to prevent future occurrences.
Network Security Engineer
A Network Security Engineer designs, implements, and maintains secure network infrastructures. While broader than just email, email traffic flows over networks, and securing its integrity and authenticity directly contributes to overall network health and protection. The DMARC Fundamentals course offers insights into DMARC, SPF, and DKIM, which a Network Security Engineer may find useful for understanding how email authentication protocols interact with network security policies. This understanding helps in configuring firewalls and intrusion prevention systems to better detect and block malicious email traffic and ensure the secure transit of email.
Cloud Security Engineer
A Cloud Security Engineer focuses on securing an organization's cloud environments, applications, and data. As many email services are cloud-hosted, securing these platforms involves understanding cloud-native security controls and protocols. The DMARC Fundamentals course may be useful for a Cloud Security Engineer to gain a foundational understanding of DMARC, SPF, and DKIM. This knowledge can help in configuring and auditing email security settings within cloud-based email platforms, ensuring that cloud-emitted and received emails adhere to authentication standards, mitigate spoofing risks, and remain compliant with cloud security best practices.
Systems Administrator
A Systems Administrator manages and maintains an organization's servers and IT systems, often including mail servers. Ensuring reliable and secure email operations is a critical part of this role. The DMARC Fundamentals course may be useful for a Systems Administrator seeking to implement and monitor DMARC, SPF, and DKIM configurations effectively. This understanding can help in troubleshooting email delivery issues, preventing email spoofing from their domain, and protecting users from inbound malicious emails, enhancing the stability and security of the entire email infrastructure under their management.
Technical Support Engineer
A Technical Support Engineer provides essential assistance and troubleshooting for IT-related issues experienced by users. Email delivery problems, authentication failures, or suspected spoofing attempts are common user complaints. The DMARC Fundamentals course may be useful for a Technical Support Engineer to diagnose such email-related issues effectively. A foundational grasp of DMARC, SPF, and DKIM helps in understanding the underlying causes of email authentication failures, identifying potential spoofing vectors, and guiding users through solutions, thereby improving their ability to resolve complex email security and delivery challenges.
Compliance Analyst
A Compliance Analyst ensures that an organization adheres to relevant regulatory standards, policies, and legal requirements. While focused on governance, understanding security measures for critical communication channels like email is often pertinent for data protection and privacy regulations. The DMARC Fundamentals course may be useful for a Compliance Analyst to assess an organization's efforts in protecting sensitive data transmitted via email and preventing phishing attacks that could lead to data breaches. This knowledge helps inform evaluations of an organization's security controls and its preparedness for audits concerning data integrity and email-related risks.
Security Awareness Trainer
A Security Awareness Trainer educates employees on cybersecurity best practices, common threats, and how to identify and avoid them. Email is a primary vector for attacks like phishing and spoofing, making awareness crucial. The DMARC Fundamentals course may be useful for a Security Awareness Trainer to grasp the technical mechanisms behind email authentication. This understanding enables them to explain with greater clarity why certain email behaviors are risky, how malicious emails are engineered, and the importance of protocols like DMARC in protecting the organization, empowering employees to make more informed decisions when interacting with email.
Digital Forensics Investigator
A Digital Forensics Investigator examines digital evidence in criminal or civil investigations, often tracing the origin and actions related to cyberattacks. Email is frequently a critical piece of evidence, especially in cases involving spear phishing, business email compromise, or malware distribution. The DMARC Fundamentals course may be useful for a Digital Forensics Investigator to understand the technical details of email authentication protocols like DMARC, SPF, and DKIM. This knowledge can help in analyzing email headers to determine message authenticity, identify spoofing attempts, and reconstruct email attack chains, which are vital steps in attributing actions and understanding incident timelines. This role typically requires an advanced degree.

Reading list

We've selected 22 books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in DMARC Fundamentals.
Provides a comprehensive deep dive into modern email authentication protocols including SPF, DKIM, and DMARC. It is highly relevant as it offers step-by-step implementation guides that mirror the learning objectives of the course. It serves as an excellent current reference for IT professionals looking to move from theory to practical deployment.
Focuses specifically on the protocols covered in the course, providing a clear breakdown of DKIM signing and SPF inclusion mechanisms. It is particularly helpful for providing prerequisite knowledge on how SMTP works before layering DMARC on top. It is commonly used by industry professionals as a handbook for securing corporate mail flows.
As most organizations implement DMARC within a cloud environment, this guide provides specific instructions for configuring SPF and DKIM within Microsoft 365. It useful reference tool for administrators who need to apply course concepts to a real-world enterprise platform. The book is recently published and aligns with current industry standards for cloud-based email security.
Since DMARC, SPF, and DKIM are all fundamentally dependent on DNS records, this book is the definitive resource for understanding the underlying infrastructure. It provides essential background knowledge on how TXT records and name servers function, which prerequisite for troubleshooting email authentication. While older, it remains the industry standard textbook for anything related to Domain Name Systems.
This handbook includes practical sections on securing communication channels, including the implementation of DMARC to prevent spoofing. It useful reference tool for building a holistic defense strategy that includes the email security concepts taught in the course. It is published by O'Reilly, a highly reputable publisher in the technology and cybersecurity space.
Provides a practical look at the tools and techniques used by defenders to monitor and secure an organization. It covers the reporting aspect of DMARC, which is crucial for identifying ongoing attacks as described in the course syllabus. It recent publication that serves as an excellent bridge between fundamental concepts and professional practice.
In a Zero Trust architecture, verifying the identity of the sender is paramount. explains how protocols like DMARC fit into a modern security model where no traffic is inherently trusted. It adds contemporary relevance to the course by showing how email authentication core component of modern cybersecurity trends.
Adds significant breadth to the course by explaining the 'why' behind DMARC through the lens of phishing attacks. It details how attackers exploit the lack of email authentication to conduct social engineering. It valuable additional reading for understanding the threat landscape mentioned in the 'Email Attacks' section of the syllabus.
Is excellent for understanding the 'Reporting' and 'Conformance' parts of DMARC. It explains how to integrate security logs into a broader monitoring strategy to detect and respond to email threats. It valuable reference for those who want to use DMARC data to improve their organization's overall security posture.
Details how to test and audit network services, including email infrastructure, for vulnerabilities. It is particularly useful for learning how to verify if SPF and DMARC are correctly implemented and effective against spoofing. It adds breadth by showing how to approach email security from an auditor's or pentester's perspective.
Teaches how to inspect network traffic, which is vital for troubleshooting email delivery and authentication issues. It helps students visualize the SMTP handshake and the exchange of DKIM signatures in real-time. It useful tool for gaining a deeper technical understanding of the protocols discussed in the course.
For learners interested in the server-side implementation of email protocols, this book covers the configuration of one of the world's most popular Mail Transfer Agents (MTAs). It provides technical depth on how servers handle SPF checks and DKIM signatures during the mail delivery process. It is more valuable as a technical reference for system administrators than as a general overview.
This textbook is often used in academic programs to cover the basics of infrastructure security. It includes sections on email security and the role of gateways in filtering spoofed content. It provides a solid academic context for the fundamental concepts of SPF and DKIM within a broader network security curriculum.
Highly reputable academic text that covers the essential principles of information security, including message authentication. It provides the theoretical framework for understanding why DKIM signatures are used to ensure non-repudiation and integrity. It is an excellent resource for students who want a more formal education on the course topics.
Provides an offensive perspective on how attackers bypass traditional security measures, emphasizing the need for robust authentication like DMARC. It includes examples of email-based attacks that the course aims to mitigate. It highly reputable title that helps students understand the 'adversary mindset' regarding email spoofing.
Written by a renowned authority in the field, this book places email security within the broader context of system dependability and protocol design. It provides a high-level academic perspective on why protocols like DMARC are necessary to fix the inherent flaws in the original SMTP design. It foundational text that adds significant theoretical depth to the course material.
For learners who find the technical aspects of DNS records intimidating, this book offers a simplified introduction. It provides the prerequisite knowledge needed to understand how to add the TXT records required for SPF and DMARC. It is more valuable as a primer for beginners than as a technical reference for experts.
While not a technical manual, this book by a leading investigative journalist provides the narrative context for why DMARC is so important today. It describes the evolution of email-based crime and the scale of the spoofing problem that DMARC aims to solve. It is highly recommended as supplemental reading to understand the real-world stakes of email security.
This classic reference that provides the technical foundation for understanding how the Internet and email protocols function at the packet level. It is helpful for providing the prerequisite networking knowledge required to understand how email headers are constructed and transmitted. While highly technical, it is the 'bible' for anyone wanting to master the mechanics behind SPF and DKIM.
Written by one of the most famous hackers in history, this book discusses how attackers spoof identities and how users can protect themselves. It provides a highly readable and engaging look at the 'Email Attacks' portion of the course syllabus. It is valuable as additional reading to spark intellectual curiosity about the importance of domain verification.
This widely used academic textbook that provides a solid foundation in the application layer of networking, where SMTP resides. It is helpful for students who need more background on how email messages are structured and transferred across the internet. It provides the necessary academic rigur to support the more specialized DMARC concepts.

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