Is DMARC essential for email deliverability and what to do when Return Path reports spam issues with good open rates?

Summary

The experts, marketers, and documentation converge on several points: DMARC is vital for domain protection, preventing spoofing and phishing, and is essential for BIMI. Although DMARC doesn't directly guarantee deliverability, it indirectly improves it by enhancing sender reputation and signaling email security. Ensuring SPF and DKIM are correctly set up is a prerequisite. When Return Path reports spam issues despite good open rates, the problem may lie in seed list inaccuracies, audience segmentation, content relevance, sending frequency, list hygiene, and overall sender reputation. To resolve this, a holistic approach is needed, involving monitoring user engagement metrics, inbox placement, checking complaint rates, validating email addresses, implementing feedback loops, and analyzing discrepancies between Return Path data and your analytics.

Key findings

  • DMARC Value: DMARC safeguards against spoofing and phishing, boosts sender reputation, and enables BIMI.
  • SPF/DKIM Foundation: Accurate SPF and DKIM settings are essential before implementing DMARC.
  • Seed List Limitations: Seed list results can be misleading; rely on real user engagement metrics.
  • Holistic View: A holistic strategy involving engagement monitoring, content quality, and authentication errors is crucial.
  • Feedback Loop Importance: Feedback loops and audience segmentation are vital for identifying and resolving issues.

Key considerations

  • DMARC Implementation: Implement DMARC to safeguard brand reputation and domain security.
  • Audience Segmentation: Segment audience for pertinent and tailored content, boosting engagement and mitigating spam reports.
  • List Hygiene: Routinely clean your email list to maximize deliverability.
  • Reputation Monitoring: Regularly assess sender reputation through metrics, tools, and feedback.
  • Address Discrepancies: Analyze variations between seed data and actual user behavior to address deliverability problems.

What email marketers say
11Marketer opinions

While opinions vary, the consensus is that DMARC is crucial for protecting your domain's reputation and preventing spoofing, which indirectly improves email deliverability. However, it's not a silver bullet and requires proper configuration of SPF and DKIM. When Return Path reports spam issues despite good open rates, it indicates potential problems with seed list accuracy, audience segmentation, content relevance, sending frequency, list hygiene, and sender reputation. Monitoring engagement metrics, inbox placement with real users, and complaint rates, while validating email addresses and implementing feedback loops, are crucial for identifying and addressing deliverability issues.

Key opinions

  • DMARC Importance: DMARC is essential for domain protection and preventing spoofing, which indirectly boosts deliverability.
  • SPF & DKIM Prerequisite: Proper SPF and DKIM configuration is essential before implementing DMARC.
  • Return Path Discrepancies: Spam reports from Return Path despite good open rates suggest issues with seed list accuracy and the need for comprehensive deliverability monitoring.
  • Engagement Focus: Monitoring and improving user engagement metrics (open rates, click-through rates) is crucial for maintaining a positive sender reputation.
  • List Hygiene: Maintaining a clean email list by removing inactive subscribers and validating email addresses is vital for reducing bounce rates and improving deliverability.

Key considerations

  • Holistic Monitoring: Focus on holistic deliverability monitoring, including real-world inbox placement testing and sender reputation.
  • List Segmentation: Properly segment your audience based on engagement and demographics for more relevant content.
  • Content Relevance: Ensure your content is relevant, personalized, and valuable to subscribers to improve engagement and reduce spam complaints.
  • Feedback Loops: Implement feedback loops to address user complaints and improve sending practices.
  • Authentication Validation: Regularly check for authentication errors (SPF, DKIM, DMARC) and address domain reputation issues.
Marketer view

Email marketer from SparkPost advises that if Return Path is reporting spam issues despite good open rates, it could indicate problems with seed list placement or a disconnect between overall engagement and seed performance. Analyze your audience segmentation, sending frequency, and content to identify potential areas for improvement. Also, verify that your SPF and DKIM records are correctly configured.

May 2021 - SparkPost
Marketer view

Email marketer from Email Geeks shares that DMARC is not a necessity to deliver emails, but a recommended current best practice. Missing DKIM or SPF may cause bounces, whereas missing DMARC will not cause those problems.

April 2023 - Email Geeks
Marketer view

Email marketer from SendGrid explains to analyze seed list placement issues. Implement a feedback loop, segment your list based on engagement, and ensure your content is relevant and personalized. Also, check for authentication errors and domain reputation issues.

February 2022 - SendGrid
Marketer view

Email marketer from EasyDMARC notes that while SPF and DKIM are crucial for authentication, DMARC is essential for policy enforcement and reporting. It enables senders to tell recipient mail servers how to handle messages that fail authentication checks, significantly reducing the risk of phishing and spoofing, thus improving deliverability.

November 2024 - EasyDMARC
Marketer view

Email marketer from Campaign Monitor shares that consistent volume, relevant content, and respecting subscriber preferences are good sending practices to follow. Avoiding sudden spikes in sending volume and monitoring bounce rates can help mitigate deliverability issues, regardless of Return Path scores.

December 2024 - Campaign Monitor
Marketer view

Email marketer from Email Marketing Forum notes that maintaining a clean email list is vital. Regularly remove inactive subscribers and validate email addresses to reduce bounce rates and improve deliverability. Also, consider implementing a double opt-in process to ensure subscribers are genuinely interested in receiving your emails.

September 2023 - Email Marketing Forum
Marketer view

Email marketer from Postmark explains that DMARC helps you avoid spam filters by giving mailbox providers clear instructions on what to do with emails that claim to be from your domain but don't pass authentication checks. It signals that you take email security seriously, which can improve your sender reputation.

February 2024 - Postmark
Marketer view

Email marketer from Mailjet shares that DMARC is essential for protecting your domain's reputation, preventing email spoofing, and improving email deliverability. It also provides valuable reporting data to monitor authentication results and identify potential issues.

February 2023 - Mailjet
Marketer view

Email marketer from StackExchange shares that consistently sending valuable content, respecting unsubscribe requests, and properly segmenting your audience are key to maintaining a good sender reputation. Low engagement rates and high spam complaints can negatively impact your deliverability, regardless of seed list results.

March 2024 - StackExchange
Marketer view

Email marketer from Litmus advises that discrepancies between Return Path data and your own analytics might stem from differences in methodology or seed list composition. Focus on holistic deliverability monitoring, including real-world inbox placement testing, engagement metrics, and sender reputation monitoring.

December 2023 - Litmus
Marketer view

Email marketer from Reddit comments that seed list results can be skewed and may not accurately reflect real user experiences. They suggest focusing more on inbox placement with real users, monitoring engagement metrics, and regularly cleaning your email list.

January 2023 - Reddit

What the experts say
7Expert opinions

The experts generally agree that DMARC is valuable for security, specifically preventing domain spoofing and phishing, and it's necessary for BIMI. While not a direct solution for deliverability, it indirectly helps by protecting sender reputation. When Return Path flags spam issues despite good open rates, it suggests a deeper problem. It could be that Return Path sees seed IPs going to spam or a discrepancy exists between seed list performance and actual user engagement due to differences in how ISPs interpret data. Pulling unengaged users off your list might temporarily improve open rates, but the long-term trend matters. Seed lists should be considered only one data point, and a focus on user engagement, list quality, and content analysis is necessary.

Key opinions

  • DMARC's Role: DMARC is critical for security (anti-spoofing, anti-phishing) and necessary for BIMI but doesn't directly guarantee deliverability.
  • SPF/DKIM First: Ensure SPF and DKIM are properly configured before implementing DMARC.
  • Return Path Interpretation: Return Path spam flags, even with good open rates, signal problems. Seed list issues or a mismatch with real user data is indicated.
  • Data Interpretation: Raw data and trends are more important than rates.
  • Engagement Matters: User engagement is crucial and can outweigh seed list data. Focus on list quality and content relevance.

Key considerations

  • Reputation Protection: Implement DMARC to protect your sending reputation, as it indirectly impacts deliverability.
  • Analyze Discrepancies: Investigate differences between Return Path data and your own analytics.
  • Focus on Long-Term Trends: Consider long-term data trends.
  • Go Beyond Seed Lists: Don't rely solely on seed list data; consider it as one factor among many.
  • Check User Complaint Rates: Check user complaint rates.
Expert view

Expert from Email Geeks responds that it could be that you’re reaching fewer inboxes with the 50 to 70 than with the 100 - 120. ISPs don’t calculate open rates the same way marketers do, they use different data. so my thinking is: did gmail see an improvement here?

July 2023 - Email Geeks
Expert view

Expert from Email Geeks answers you need DMARC if you want to do BIMI.

March 2022 - Email Geeks
Expert view

Expert from Word to the Wise shares that seed lists are merely one data point, and you shouldn't rely on them as the sole indicator of deliverability, especially if your user engagement metrics look healthy. Analyze your sending practices, list quality, and content to uncover the root cause of any discrepancies. Check user complaint rates too.

February 2025 - Word to the Wise
Expert view

Expert from Email Geeks explains that Return Path's seeds going to spam means the sender's reputation isn’t good enough for seeds to be delivered to the inbox. Some current subscribers may also receive mail in the spam folder and new subscribers will likely receive mail in the spam folder. It is an early warning sign that all is not well at Gmail and to look harder at your overall audience.

December 2022 - Email Geeks
Expert view

Expert from Email Geeks explains that DMARC is a policy for what to do when SPF and DKIM fail, and it can provide insight into possible authentication problems or phishing, but it doesn't directly help deliverability.

January 2023 - Email Geeks
Expert view

Expert from Spam Resource explains that DMARC is a useful tool for preventing domain spoofing and phishing. It's not a magic bullet for deliverability, but it can help protect your sending reputation, which indirectly improves inbox placement. Make sure SPF and DKIM are correctly configured first.

October 2022 - Spam Resource
Expert view

Expert from Email Geeks shares that the sender has basically just pulled off the unengaged users or the folks who were getting the mail in their bulk folder. It is best to keep an eye on things as it may be nothing that the seeds are going to bulk.

July 2023 - Email Geeks

What the documentation says
5Technical articles

The documentation consistently highlights DMARC's role in enhancing email security and authentication by building upon SPF and DKIM. It provides a policy framework for handling unauthenticated mail, protecting against spoofing and phishing. Furthermore, DMARC offers reporting mechanisms that enable domain owners to monitor their email authentication practices and identify potential abuse. If deliverability issues persist despite good open rates, it's recommended to check sender reputation, bounce rates, feedback loops, and blocklist status.

Key findings

  • DMARC Enhances Security: DMARC provides an additional layer of security against spoofing and phishing attacks.
  • Builds on Existing Standards: DMARC builds upon SPF and DKIM to improve overall email authentication.
  • Provides Reporting: DMARC offers reporting mechanisms for monitoring email authentication and identifying abuse.
  • Enables Policy Enforcement: DMARC allows domain owners to specify policies for handling unauthenticated mail.
  • Requires Sender Reputation Check: If deliverability issues continue, check sender reputation, bounce rates, and blocklist status.

Key considerations

  • Proper Configuration: Ensure DMARC policies are configured correctly to prevent attackers from using your domain.
  • Feedback Loop Implementation: Implement and monitor feedback loops to identify and address deliverability issues.
  • Reputation Monitoring: Regularly check sender reputation using tools like Sender Score.
  • Blocklist Awareness: Ensure your domain and IP addresses are not on any blocklists.
  • Bounce Rate Management: Monitor and manage bounce rates to maintain good list hygiene.
Technical article

Documentation from Microsoft advises that if you're experiencing deliverability issues, even with good open rates, check your sender reputation using tools like Sender Score and ensure you're not on any blocklists. Also, monitor your bounce rates and feedback loops to identify potential problems with your sending practices or list hygiene.

March 2021 - Microsoft Learn
Technical article

Documentation from Valimail states that DMARC helps ensure that legitimate email is properly authenticated against established industry standards (SPF and DKIM) and that unauthenticated email is blocked. This gives organizations control over their sending domains, which protects their brand and improves deliverability.

September 2024 - Valimail
Technical article

Documentation from Google explains that DMARC builds on SPF and DKIM to add domain-level policy and reporting to email authentication. It helps receiving mail servers know what to do with messages that fail SPF and DKIM checks, improving deliverability and protecting against spoofing and phishing attacks.

September 2024 - Google
Technical article

Documentation from Mimecast suggests that proper configuration of DMARC policies prevents attackers from using your domain to launch phishing attacks. This builds trust among recipients and increases the chances that your emails will be delivered to the inbox.

March 2021 - Mimecast
Technical article

Documentation from RFC specifies that DMARC allows a domain owner to express a policy regarding unauthenticated mail, and provides a mechanism for mail receivers to provide feedback to the domain owner about mail they receive using that domain. This feedback helps domain owners improve their authentication practices and identify potential abuse.

November 2023 - RFC Editor