How is Gmail enforcing its new sender requirements, and what impact are senders seeing?

Summary

Gmail is actively enforcing new sender requirements to reduce spam, prevent impersonation, and improve user experience. Enforcement includes gradual tightening of restrictions, stricter authentication checks (SPF, DKIM, DMARC), spam rate monitoring (with a target below 0.1% and potential inbox restrictions above 0.3%), easy unsubscription options, and DMARC validation. Senders are experiencing increased 4xx errors, bounce rates, spam folder delivery, declining open rates (especially for cold emails and new subscribers), throttling, and delayed delivery. To adapt, senders are focusing on strict email hygiene, personalized content, audience segmentation, improved email validation, and adhering to SMTP standards. Google recommends using Postmaster Tools to monitor sender reputation and address any issues. Failure to comply may result in emails being marked as spam, rejected, or facing deliverability challenges.

Key findings

  • Enforcement Mechanisms: Gmail employs a combination of techniques, including authentication checks, spam rate monitoring, inbox placement adjustments, temporary failures, and stricter DMARC validation.
  • Impact on Senders: Senders are experiencing increased bounce rates, spam folder delivery, declining open rates, throttling, and deliverability challenges.
  • Authentication is Critical: Proper configuration of SPF, DKIM, and DMARC is essential for authenticating emails and preventing spoofing, with stricter enforcement of DMARC.
  • Spam Rate Threshold: Maintaining a low spam rate (below 0.1%) is crucial, with inbox restrictions potentially triggered above 0.3%, especially for new subscribers.
  • Adaptation Strategies: Senders are adapting by implementing stricter email hygiene, personalizing content, segmenting audiences, and improving email validation.

Key considerations

  • Implement Comprehensive Authentication: Configure SPF, DKIM, and DMARC records correctly and keep them updated to ensure proper email authentication.
  • Maintain Low Spam Rate: Monitor and manage spam rates to stay below the threshold, segmenting data to identify problematic segments quickly.
  • Focus on User Engagement: Create personalized, engaging content that recipients want to receive to minimize spam complaints and improve open rates.
  • Utilize Postmaster Tools: Regularly monitor Google Postmaster Tools to track sender reputation and identify any deliverability issues.
  • Simplify Unsubscription: Make it easy for recipients to unsubscribe to comply with requirements and maintain a clean email list.
  • Email Preview: Test emails across different clients, or use testing tools, as poorly formatted emails are more likely to be marked as spam.

What email marketers say
11Marketer opinions

Gmail's enforcement of its new sender requirements is causing significant changes and challenges for email senders. These requirements include stricter authentication, lower spam rates, and easier unsubscription processes. Senders are experiencing increased bounce rates, placement in spam folders, declining open rates (especially for cold emails), throttling, and delayed delivery. In response, senders are focusing on stricter email hygiene, personalized content, audience segmentation, and improved email validation processes. Smaller businesses and those with less established reputations may face greater difficulties.

Key opinions

  • Deliverability Impact: Senders are seeing increased bounce rates and more emails landing in spam folders due to not meeting authentication and spam rate requirements.
  • Engagement Decline: Open rates are declining, particularly for cold email campaigns, indicating a need for more targeted and engaging content.
  • Traffic Management: Throttling and delayed delivery are occurring, suggesting Gmail is limiting email volume from certain senders, especially during peak times.
  • Compliance is a Must: Increased scrutiny is pushing senders to focus on proper authentication (SPF, DKIM, DMARC) and maintaining low spam rates to avoid penalties.

Key considerations

  • Email Hygiene: Implement strict email validation processes to remove invalid addresses and reduce bounce rates.
  • Personalization: Focus on creating personalized content and segmenting audiences to improve engagement and avoid being flagged as spam.
  • Authentication: Ensure proper configuration of SPF, DKIM, and DMARC records to authenticate email and improve deliverability.
  • Monitoring: Utilize tools and services to monitor sender reputation and address deliverability issues promptly to maintain a positive standing with Gmail.
  • Email Preview: Use testing tools to ensure emails render correctly across different devices and email clients. Poorly formatted emails are more likely to be marked as spam, leading to deliverability issues.
Marketer view

Email marketer from Stack Overflow shares that Senders are now implementing stricter email validation processes to remove invalid or inactive email addresses from their lists. This helps reduce bounce rates and improve sender reputation.

June 2023 - Stack Overflow
Marketer view

Email marketer from MarketingOverCoffee Forum mentions that the enforcement is causing a decline in open rates, especially for cold email campaigns. Senders are having to work harder to build trust and engagement to avoid being flagged as spam.

April 2023 - MarketingOverCoffee Forum
Marketer view

Email marketer from Email Geeks shares that something is definitely happening with the new Gmail requirements, with bounce reasons indicating mail is being affected.

July 2023 - Email Geeks
Marketer view

Email marketer from Email Geeks shares that they are seeing more deferral activity from Gmail compared to last year, and that there is more interest in deliverability as a result.

March 2024 - Email Geeks
Marketer view

Email marketer from EmailOnAcid shares it is now more important to preview emails, and that senders need to use email testing tools to ensure their emails render correctly across different devices and email clients. Poorly formatted emails are more likely to be marked as spam, leading to deliverability issues.

February 2024 - EmailOnAcid
Marketer view

Email marketer from LinkedIn notes that senders are experiencing throttling and delayed delivery, especially during peak sending times. Gmail appears to be limiting the volume of emails from certain senders to protect its infrastructure and user experience.

September 2022 - LinkedIn
Marketer view

Email marketer from Email Geeks shares that something is happening with Gmail enforcement, as evidenced by complaints about dropped engagement rates aligning with Google's actions, though not always communicated through response codes.

February 2022 - Email Geeks
Marketer view

Email marketer from Neil Patel's Blog shares that Gmail's increased scrutiny on sender reputation and authentication methods are pushing email marketers to adopt stricter email hygiene practices. Smaller businesses with less established sender reputations might struggle to meet the new requirements, leading to deliverability challenges.

February 2024 - Neil Patel's Blog
Marketer view

Email marketer from Reddit shares that Gmail's enforcement of the 0.3% spam rate threshold is causing headaches for many senders. Even legitimate senders with occasional spam complaints are finding their emails being filtered more aggressively.

September 2021 - Reddit
Marketer view

Email marketer from EmailGeek shares that senders are experiencing increased bounce rates and placement in the spam folder, particularly if they don't have SPF, DKIM, and DMARC set up correctly. This is leading to more complex troubleshooting for email deliverability issues.

June 2023 - EmailGeek
Marketer view

Email marketer from Quora shares that Gmail's changes are forcing senders to focus more on personalized content and audience segmentation. Generic email blasts are becoming less effective, and senders need to tailor their messages to individual user preferences.

March 2024 - Quora

What the experts say
10Expert opinions

Gmail is actively enforcing its new sender requirements through various methods, including stricter authentication checks, spam rate monitoring, and adjustments to inbox placement. Senders not meeting these requirements are facing increased 4xx errors, blocks, spam folder delivery, and restricted inbox placement, particularly for new subscribers. Google is also gradually tightening restrictions and using mechanisms like temporary failures to provide senders with actionable insights. This enforcement is part of an effort to reduce the 'grey area' in filtering and ensure user satisfaction.

Key opinions

  • Gradual Enforcement: Google is gradually tightening restrictions rather than implementing drastic changes, giving senders time to adapt.
  • Compliance Monitoring: Google is monitoring sender compliance and adjusting email handling based on factors like authentication, DMARC, and spam rates.
  • Differential Impact: Enforcement impacts vary based on sender reputation and compliance, with senders in the 'grey area' facing more scrutiny.
  • Inbox Restrictions: Senders exceeding the 0.3% spam rate may experience inbox restrictions, especially for new subscribers, and must maintain a low spam rate to avoid penalties.
  • Early Warning Systems: Gmail implements early stage enforcement such as moving new subscribers to the bulk/spam folder.

Key considerations

  • Authentication Importance: Ensure proper authentication (SPF, DKIM, DMARC) to avoid increased errors and potential blocks.
  • Spam Rate Management: Maintain a spam rate below 0.3% to avoid inbox restrictions and segment data to monitor for any sudden rises.
  • Monitoring and Adaptation: Monitor email performance metrics and adapt sending practices to address any deliverability issues promptly.
  • User Satisfaction: Focus on user satisfaction and sending emails that recipients want to receive to avoid being flagged as spam.
Expert view

Expert from Spamresource explains that Gmail will start to temporarily fail a small percentage of a bulk sender's non-compliant traffic to give senders specific, actionable insight into the exact guidelines they aren't meeting, while their email keeps flowing.

August 2022 - Spamresource
Expert view

Expert from Email Geeks suggests that Google has various methods before resorting to deferrals and that deferrals indicate a significant problem with the mail.

October 2021 - Email Geeks
Expert view

Expert from Word to the Wise explains that Senders not meeting the requirements will be impacted by delivery to spam folder or not delivered at all. And the sender requirements are now being fully enforced by Gmail.

August 2023 - Word to the Wise
Expert view

Email marketer from Email Geeks shares that Google restricts inbox placement when over 0.3% spam rate, and it can recover when the rate stays under for a while.

July 2023 - Email Geeks
Expert view

Expert from Email Geeks shares that Google aims to keep users happy and is giving senders time to adapt, reducing the 'grey area' in filtering.

March 2024 - Email Geeks
Expert view

Expert from Email Geeks shares Google monitors compliance and is ramping up enforcement slowly for large senders of wanted email, faster for less wanted email, with impacts like blocks and increased friction.

December 2021 - Email Geeks
Expert view

Expert from Email Geeks explains that Google is gradually tightening restrictions, noting increased 4xx errors at Gmail for bulk senders lacking authentication, DMARC, or with poor domain reputations.

September 2023 - Email Geeks
Expert view

Email marketer from Email Geeks details that certain segments will see a drop in opens when over 0.3% spam rate, in particular newer subscribers. This can typically be solved by dropping those segments that are down in terms of stats until they see complaint rates drop back in the healthy range.

March 2023 - Email Geeks
Expert view

Expert from Email Geeks mentions the idea that mail to new subscribers going to bulk and mail to existing subscribers going to the inbox is one of the earlier stages of enforcement.

October 2022 - Email Geeks
Expert view

Email marketer from Email Geeks explains enforcement regarding authentication is happening and shares that they had a cache issue with their ESP where their domain wasn't authenticated for 1 hour and alarms for bounces started happening.

October 2021 - Email Geeks

What the documentation says
5Technical articles

Gmail is enforcing new sender requirements to combat spam, prevent impersonation, and improve user experience. These requirements emphasize email authentication (SPF, DKIM, DMARC), easy unsubscription options, and maintaining low spam rates (below 0.1%). Stricter DMARC validation and adherence to established SMTP standards are critical for deliverability. Google recommends using Postmaster Tools to monitor sender reputation and address any issues. Failure to comply may result in emails being marked as spam, rejected, or facing deliverability challenges.

Key findings

  • Authentication is Key: Proper configuration of SPF, DKIM, and DMARC is essential for authenticating emails and preventing spoofing.
  • Low Spam Rate: Maintaining a low spam rate (below 0.1%) is a crucial requirement for successful delivery.
  • DMARC Validation: Gmail is strictly enforcing DMARC validation, impacting senders who fail to configure it correctly.
  • Standards Compliance: Adherence to established SMTP standards and best practices improves deliverability.
  • Monitoring Tools: Google recommends using Postmaster Tools to monitor sender reputation and identify deliverability issues.

Key considerations

  • Implement SPF Records: Ensure valid SPF records in DNS accurately define authorized sending servers.
  • Configure DKIM: Implement DKIM to add a digital signature to emails, verifying their authenticity.
  • Set up DMARC: Configure DMARC to instruct recipient mail servers on how to handle emails that fail SPF and DKIM checks.
  • Monitor Postmaster Tools: Regularly monitor Google Postmaster Tools to track sender reputation and address any identified issues.
  • Simplify Unsubscription: Provide easy and accessible unsubscription options for recipients.
Technical article

Documentation from Mailjet explains that Gmail's enforcement includes stricter DMARC (Domain-based Message Authentication, Reporting & Conformance) validation. Senders who fail to properly configure DMARC may experience deliverability issues, including emails being marked as spam or rejected.

September 2023 - Mailjet
Technical article

Documentation from Google Workspace Updates explains that Gmail is enforcing new sender requirements to reduce spam, prevent impersonation, and ensure users receive the emails they want. Senders are required to authenticate their email, make it easy for users to unsubscribe, and keep their spam rate below 0.1%.

October 2021 - Google Workspace Updates
Technical article

Documentation from SparkPost explains that Gmail recommends using Google Postmaster Tools to monitor sender reputation and identify potential issues. Senders with low reputation scores may face deliverability challenges, and Google is using this data to enforce its sender requirements.

December 2023 - SparkPost
Technical article

Documentation from Microsoft Learn explains that Gmail requires valid SPF records in DNS to help prevent email spoofing. These SPF records need to accurately define the authorized servers sending emails on behalf of the domain or messages are more likely to be filtered.

July 2021 - Microsoft Learn
Technical article

Documentation from RFC Editor explains that Gmail's enforcement aligns with established SMTP standards and best practices for email delivery. Senders who adhere to these standards are more likely to achieve successful delivery and avoid being flagged as spam.

March 2025 - RFC Editor