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HomeThe Ultimate Guide to DMARC and its Impact on Email DeliverabilityInsightsThe Ultimate Guide to DMARC and its Impact on Email Deliverability

The Ultimate Guide to DMARC and its Impact on Email Deliverability

Email deliverability is the measure of the success at which your emails land in the inboxes of those you are trying to reach. It is the foundation for effective email marketing and communication, impacting viewer engagement, brand reputation, and bottom-line business results. When your emails get blocked or land in the spam folder, it hinders your reach and can degrade your reputation. Enter Domain-based Message Authentication, Reporting, and Conformance (DMARC), a solution that can significantly boost your email deliverability. This article offers a comprehensive guide to understanding DMARC and its importance to your business.

Understanding DMARC

DMARC is an email authentication protocol that enables email domain owners to protect their domain from unauthorized use, known as email spoofing. The purpose and principal benefit of DMARC is to increase email trust and reliability. DMARC works in conjunction with two other technologies SPF (Sender Policy Framework) and DKIM (Domain Keys Identified Mail).

When a sender attempts to deliver an email, DMARC helps the receiving server to verify that the outgoing email is authentic, meaning it has been sent by the owner of the domain, and hasn’t been tampered with during delivery. This is critical in preventing scams like phishing and enhancing your organization’s email deliverability.

The Role of DMARC in Email Deliverability

The implementation of DMARC has a substantial impact on the rate of successful email deliveries. By validating that each email is genuinely from the sender’s domain, DMARC reduces the delivery of spoofed emails, thereby decreasing the chances of your legitimate emails being mistaken or blocked as spam.

Using DMARC policies, businesses can instruct email receiving servers how to handle emails that fail DMARC checks. This control debunks spoofers who forge your email domain onto their phishing emails in an increasingly sophisticated manner. For example, consider an email campaign to customers from a large e-commerce company. By implementing DMARC, they can prevent potential impersonation, protecting their credibility and ensuring legitimate emails reach customer inboxes effectively.

Advantages of Implementing DMARC for Businesses

Beyond mere email deliverability, DMARC provides numerous benefits for businesses. By controlling email delivery against forgery, businesses can protect their brand reputation, enhance consumer trust, and guard against potential financial losses due to phishing scams. According to Verizon’s 2019 Data Breach Investigations Report, phishing is involved in 32% of confirmed breaches. Hence, the role of DMARC becomes crucial in blocking such malicious emails.

Implementation of DMARC: A Step-by-Step Guide

Implementing DMARC involves creating a DMARC record and publishing it to your domain’s DNS (Domain Name System). The standard format of a DMARC record includes the “v” (version), “p” (policy), “rua” (Reporting URI of aggregate reports), and “ruf” (Reporting URI of forensic reports). Tag “p” instructs receiving servers on how to handle emails failing authentication checks. DMARC policies include “none” (take no action), “quarantine” (send to spam/junk folder), and “reject” (reject the mail outright).

By correctly setting up the DMARC, you can ensure that only authenticated emails reach your recipients, enhancing email deliverability.

Overcoming Challenges in DMARC implementation

Despite its benefits, DMARC implementation may pose challenges for businesses. Common issues include lacking expertise to understand the XML format of DMARC aggregate reports, and dealing with frequent changes in the email landscape such as new sending sources. Businesses can overcome these by gradually moving from “None” to “Quarantine” to “Reject” policy, for better control over public domains, and leveraging third-party services for DMARC monitoring and management.

The Interrelation of DMARC with SPF and DKIM

SPF and DKIM are email authentication methods used in conjunction with DMARC for email protection. SPF allows senders to define servers permitted to send email on their behalf while DKIM adds an encrypted signature to the email header, verifying the email’s integrity. DMARC leverages these protocols, providing a definitive action based on their check results, thus forming a robust email security ecosystem.

Leveraging FlashInfo for Enhanced Email Security and Deliverability

In the realm of reinforcing email security and optimizing deliverability, integrating solutions like FlashInfo can be instrumental. FlashInfo is pivotal in offering real-time notifications and alerts, empowering businesses to swiftly respond to potential email threats and anomalies. The immediacy provided by FlashInfo ensures that organizations can address issues related to DMARC, SPF, and DKIM promptly, rectifying any unauthorized or spoofed emails swiftly before they impact email deliverability and brand reputation. Moreover, the incorporation of FlashInfo facilitates enhanced monitoring and management of email communications, allowing businesses to maintain optimal email deliverability and shield their domains from malicious activities effectively. By coupling DMARC implementation with the vigilant alert system of FlashInfo, enterprises can fortify their email security framework and assure the secure and reliable delivery of emails to their intended recipients.


1. What is DMARC and how does it work?

DMARC (Domain-Based Message Authentication, Reporting and Conformance) is an email authentication protocol that helps to protect email domains from being used in email spoofing. When an email is received, DMARC helps the receiving server to verify if the email was genuinely sent by the owner of the domain and hasn’t been tampered with during transit, enhancing email deliverability.

2. How does DMARC improve email deliverability?

DMARC improves email deliverability by validating the authenticity of the sender and the integrity of their messages. This verification helps the receiving server decide if the email is legitimate and should be delivered to the recipient’s inbox, thereby reducing spam and increasing the likelihood of email deliverability.

3. How can I implement DMARC for my domain?

Implementing DMARC involves creating a DMARC TXT record in your domain’s DNS and configuring it according to your email policies. The TXT record specifies your DMARC policy that advises receivers what to do if an email fails the DMARC Checks. Companies often start with a nonrestrictive policy and, over time, switch to a policy where unauthenticated emails are either sent to the spam folder or rejected outright.

4. Can DMARC prevent all types of email spoofing and phishing?

DMARC greatly reduces the success of email spoofing and phishing attacks by verifying that each email originates from the domain it claims to be from. While DMARC significantly increases email security, no tool can entirely prevent all types of cyber attacks. Thus, it’s important to use DMARC alongside other security measures for comprehensive protection.

5. What are SPF and DKIM, and how do they relate to DMARC?

SPF (Sender Policy Framework) and DKIM (Domain Keys Identified Mail) are email authentication methods forming the basis of DMARC. SPF allows domain owners to specify which mail servers are authorized to send emails on their behalf. DKIM enables senders to digitally sign their emails, verifying that the email content has not been tampered with in transit. These results are subsequently used by DMARC when applying its specified policy.

6. What are the benefits of using DMARC for my business?

Implementing DMARC can enhance your brand’s trust and credibility by protecting it from email spoofing and phishing attacks. It improves email deliverability, ensuring that your legitimate emails aren’t wrongly categorized as spam. This could potentially lead to improved open rates, increased user engagement and, therefore, higher conversion rates.


With a surge in email-borne threats, incorporating DMARC into your email security strategy can ensure superior email deliverability, reinforced brand trust, and enhanced protection for your customers. By understanding and effectively implementing DMARC, businesses can enjoy a safer and rather productive email communication channel.

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