Why is DMARC Important? [2025 Updated]

The importance of DMARC is evident in sender verification and spoofing protection. If a threat actor sends an email on behalf of your company, DMARC allows you to take authoritative action against it. This helps stop spam and phishing in its tracks. DMARC also provides insight into your email marketing efforts and stops your domain from being used by cyber-criminals. With the cost of cybercrime expected to reach $15 Trillion by 2029, using future-ready solutions like DMARC is the way ahead. 

In this blog post, we’ll explain the importance of DMARC authentication and what you can do to implement it correctly for your domain.

What is DMARC and How Does it Work?

DMARC, or Domain-based Message Authentication, Reporting, and Conformance is an email authentication protocol. DMARC, when configured on top of existing SPF and DKIM records, helps you confirm whether an email sent from your domain is genuine or fake. It allows email receivers to authenticate, report on and enforce policy around emails sent from domain names they don’t control. 

DMARC helps organizations protect their domains from impersonation and abuse. It allows domain owners to specify actions they wish to take against emails failing SPF and DKIM checks. The DMARC authentication process is explained below: 

1. Authentication – DMARC builds on SPF and DKIM to verify if an email is legitimately sent from the domain it claims to be from.

2. Policy Enforcement – The domain owner can set a policy to:

• None (p=none): Monitor and collect data without blocking emails.
• Quarantine (p=quarantine): Mark suspicious emails as spam.
• Reject (p=reject): Block unauthorized emails completely.

3. Reporting – DMARC provides reports to domain owners, helping them analyze email traffic, monitor failed deliveries, understand authentication results, and detect unauthorized email activity.

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Why is DMARC Important?

In 2025, the importance of DMARC is clear due to various unavoidable threats, and mandatory industry requirements. Irrespective of your company size or industry, every organization needs information security and domain protection. Let’s explore the reasons one by one. 

1. Email Security and Spoofing Protection 

Phishing attacks and domain spoofing are rampant, leaving domains weak and vulnerable without protection. DMARC prevents cyber attackers from forging domain names, protecting both your brand and your clients from phishing, spoofing, and receiving emails containing sensitive information like usernames, passwords, or credit card details.

2. Brand Reputation & Digital Brand Protection

If your domain is compromised or easily impersonated, your brand’s reputation takes a hit! Enforcing DMARC blocks unauthorized access to your domain name, preventing the risk of impersonation and brand abuse. DMARC improves your digital brand protection by differentiating legitimate emails from fraudulent ones.

3. Customer Trust

Customers heavily rely on the trust they place in brands when opening an email. Receiving a phishing email from a known brand can make customers lose their trust. Having DMARC in place reassures recipients that your emails are legitimate.

The Importance of DMARC in Email Deliverability

From 2024 onwards, without DMARC your emails may get flagged as spam or even rejected by several major email providers! To ensure effective communication and unhindered deliverability, implementing DMARC is crucial. 

DMARC Improves Deliverability

Authenticated emails reach inboxes more easily. DMARC ensures your legitimate emails pass through smoothly, improving your chances of being delivered. Many organizations using DMARC have witnessed a boost in their email deliverability rate within a short period of implementation.

DMARC Prevents Domain Impersonation

DMARC at p=reject prevents phishing and spoofing attacks. So recipients are less likely to report or blocklist your domain.

DMARC Maintains Domain Reputation

Enabling DMARC helps maintain your domain reputation, a metric often avidly tracked by internet service and mailbox providers. A positive domain reputation ensures better inbox placement and better deliverability. 

DMARC Enhances Email Marketing Effectiveness

If your company frequently sends marketing and promotional emails, you need DMARC. While some legitimate emails you send might be flagged as spam by recipient email providers, DMARC helps prevent this. Authenticating your emails ensures better ROI in your email marketing campaigns by increasing email deliverability success rates and ensuring your messages reach the intended inboxes.

DMARC Ensures Compliance

• Google and Yahoo guidelines have made email authentication mandatory for all senders. Businesses that comply with these guidelines automatically face fewer rejections and delivery issues. 
• The PCI SSC mentions DMARC implementation as an example of “good practice” alongside similar anti-phishing controls, for enhanced domain protection. While not a mandate, domain owners can configure the protocol to improve their defenses against email fraud.

The Importance of DMARC for Bulk Senders 

Google and Yahoo rolled out their bulk sender requirements in 2024, mandating DMARC for everyone sending more than 5000 emails per day. This especially applies to organizations that send out marketing or promotional emails to their customers daily. The major email service providers are changing their guidelines to incorporate safe sender practices like DMARC to enhance their anti-spam and anti-phishing efforts. 

DMARC can be a game-changer when it comes to securing your bulk email campaigns. It makes sure no one can impersonate you to defraud your customers. This makes DMARC a critical weapon against phishing, spoofing, and email fraud and is highly recommended by industry leaders. 

It is also important to note that DMARC is no longer optional. High-volume email senders failing to implement DMARC at least at “none” will lead to email deliverability issues, increased email bounce rates, and spam complaints. 

Consequences of Not Having a DMARC Policy

There are several negative implications of not having DMARC. They are: 

1. Increased Vulnerability to Phishing and Spoofing Attacks

Organizations that don’t have DMARC implemented, or use overly permissive DMARC policies, face an increased risk of impersonation. This results in potential vulnerabilities like phishing and spoofing attacks. 

2. Negative Impact on Email Deliverability and Brand Reputation

Not having a DMARC policy in place also hurts your email deliverability and brand reputation. Due to the increased risk of spoofing and impersonation, attackers target unprotected brand domains to send phishing emails to unsuspecting users. This can damage your brand reputation, leading to your legitimate emails being flagged as spam or your domain being blocklisted. Subsequently, all these factors contribute to poor email deliverability. 

Examples of Organizations Affected by the Lack of DMARC

1. In 2024, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) reported that North Korean cyber actors, specifically the Kimsuky group, exploited weak or nonexistent DMARC policies to conduct spear-phishing campaigns.
2. A study revealed that over 95% of the top 100 Chinese brands lacked DMARC policies, making them susceptible to email spoofing and phishing attacks.
3. A law enforcement agency (LEA) experienced significant benefits after implementing DMARC at the ‘reject’ policy level—the highest enforcement setting. Within a few months, the agency saw a notable reduction in email spoofing attempts, enhancing the security of their communications. 
4. Several PowerDMARC customers and channel partners reported improved email deliverability and reduced spoofing attacks after implementing DMARC.

DMARC in Mail Flow Monitoring

DMARC plays a critical role in email flow and deliverability monitoring owing to its reporting feature. To use this feature, organizations can simply enable the “rua” tag in their DMARC DNS record. Following this, receiving email providers send comprehensive XML reports which provide detailed insight into an organization’s email ecosystem. These raw reports can be tough to read, but DMARC analyzer tools can parse, organize, and present this data in a human-readable format, often via interactive dashboards, making it easier to monitor email flow, failed deliveries, and authentication status.

DMARC RUA Reports help businesses: 

• Identify unauthorized senders attempting to spoof their domain.
• Detect potential phishing threats targeting customers and employees.
• Monitor email authentication success rates to improve deliverability.
• Gain better visibility and control over domain usage to prevent abuse.

Steps to Implement DMARC

Given below is a step-by-step guide to implementing DMARC:

1. Create SPF and DKIM Records 

In order to implement DMARC you need either SPF or DKIM implementation. At PowerDMARC we recommend both SPF and DKIM implementation to enhance your overall security and reduce false positives. 

• Get started by creating your SPF and DKIM using our SPF and DKIM record generator tools. 
• Manually publish the record on your domain’s DNS. Or, sign up with PowerDMARC to automatically publish your DNS records without DNS access using our auto DNS publishing feature.
• Note that both records must be correctly set up to get the best results. You can validate your record after implementation using our SPF and DKIM checker tools on our Toolbox. 

2. Configure Your DMARC Policy

To configure DMARC you need to have a policy in place, denoted by the “p=” tag. The 3 DMARC policies include: 

• none: To monitor your email traffic without enforcement.
• quarantine: To flag suspicious messages or lodge them in the receiver’s quarantine folder.
• reject: To prevent suspicious emails from being delivered to your receivers.

It’s important to start with a policy of “none” before shifting to “quarantine” and finally to “reject”. This gradual yet strategic transition from permissive to enforced DMARC policies allows you to maintain and improve your email deliverability.

3. Create Your DMARC Record

You can use our DMARC record generator tool to create your DMARC record without any technical hassle. The tool creates a record that is ready to publish, syntactically correct, and devoid of human errors. Implementing DMARC for your domain, in reality, requires you to simply publish a DMARC record in your DNS with a one-line syntax.

4. Enable Reporting 

As soon as you implement DMARC, it’s important to enable reporting from the get-go. Reporting in DMARC allows you to monitor your email traffic and identify inconsistencies in deliverability. It can also help pick up on suspicious sending sources. 

Common Challenges and Solutions 

There are several challenges organizations may face when configuring DMARC: 

Barriers to DMARC Adoption

• Many organizations find DMARC complex to implement and maintain, sometimes due to the misconception that it’s overly difficult. While publishing the initial record is straightforward, managing and monitoring domains, especially multiple ones, requires ongoing effort.
• Due to a lack of in-house sources and enough awareness of the protocols, successful deployment can be delayed.

Possible Solutions

• Organizations can consider using Hosted DMARC solutions for automated DMARC implementation and easy DMARC management, simplifying the process of monitoring, reporting, and policy enforcement.
• Make a strategic and gradual shift toward enforced DMARC policies while monitoring your reports.
• You should regularly review your DMARC reports to stay updated on any email deliverability issues or spoofing attempts. 

The Future of DMARC

As email threats continue to grow more sophisticated, the demand for email authentication protocols like DMARC will continue to surge. There has been an 11% increase in DMARC adoption in 2024 as compared to 2023. Google’s 2024 email authentication mandates have contributed to a noticeable rise in DMARC adoption. 

Governments and industry regulators are also pushing for DMARC adoption, which is only expected to rise. DMARC will become a key compliance factor in the upcoming years for regulatory bodies all around the world!

Alongside DMARC, adoption rates for supporting protocols like SPF and DKIM, and advanced protocols like BIMI and MTA-STS are also expected to rise. This will enhance domain security and email trustworthiness. 

Final Words

The need for DMARC is evident when we notice the surge in cyber threats, especially the exploitation landscape in SMTP email communications. Therefore, DMARC has not only gained substantial importance in recent years but some companies are striving toward making it mandatory for their employees so as to prevent the loss of sensitive data and resources. 

It is time that you take into consideration its various benefits and shift towards a safer email experience. PowerDMARC can help you get started – take a free DMARC analyzer trial today to try it out yourself! 

Frequently Asked Questions

What happens if I don’t implement DMARC?

If you don’t implement DMARC, you are at an increased risk of: 

• Poor email deliverability 
• Email bounces and spam complaints 
• Phishing attacks, spoofing, and business email compromise 
• Non-compliance with Google, Yahoo, and several other industry and government mandates.

Is DMARC relevant to marketers and bulk email senders?

DMARC is critical for email marketers and bulk senders as major email providers like Google and Yahoo have mandated DMARC implementation for high-volume senders. Failing to do so can lead to email deliverability issues. Implementing DMARC can also improve ROI on email marketing campaigns.

How can I improve email deliverability with DMARC?

To improve email deliverability with DMARC you need to:

• Properly configure SPF, DKIM, and DMARC records.
• Monitor reports to identify and address authentication failures.
• Use a gradual approach when enforcing policies to minimize disruptions.

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• About
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Ahona Rudra

Domain & Email Security Expert at PowerDMARC

Ahona is the Marketing Manager at PowerDMARC, with 5+ years of experience in writing about cybersecurity topics, specializing in domain and email security. Ahona holds a post-graduation degree in Journalism and Communications, solidifying her career in the security sector since 2019.

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