Why is SNDS reporting all green IPs with no delivery uplift?

Summary

A green SNDS status indicates Microsoft isn't detecting immediate IP-related policy violations, but it doesn't guarantee delivery uplift. Experts and documentation emphasize that overall sender reputation (domain, authentication, engagement), content quality, list hygiene, sending practices, and technical standards (SMTP) are crucial. SNDS provides a limited view and its data might be unreliable. Sending habits resembling spamming can negate a clean IP, highlighting the need for a holistic approach to deliverability.

Key findings

  • SNDS Limitations: SNDS is not a reliable indicator of deliverability; its colors may be inaccurate.
  • Comprehensive Reputation: Sender reputation includes IP, domain, authentication, content, and engagement.
  • User Engagement: Low engagement and high complaint rates can hurt deliverability despite a clean IP.
  • Practices Matter: Practices similar to spamming negatively affect deliverability.
  • Beyond technical checks: If IP configuration and technical standards are adhered to, additional factors need to be checked to diagnose issues.

Key considerations

  • Monitor Reputation: Monitor sender reputation beyond SNDS, across all channels and mailbox providers.
  • Authentication: Ensure proper SPF, DKIM, and DMARC setup.
  • Content Audit: Improve the quality of your email content, testing for spam trigger words and mobile responsiveness.
  • List Hygiene: Maintain clean lists by segmenting engaged users and removing unengaged ones.
  • Complaint Monitoring: Track and address spam complaints proactively.
  • Test Email Rendering: Test your emails across different clients and devices to ensure optimal user experience.
  • Sender Behaviour: Ensure unsubscribe links are visible and easy to use. Manage list hygiene and sending volumes.

What email marketers say
12Marketer opinions

While SNDS reporting a green IP status indicates that Microsoft isn't detecting immediate technical issues or policy violations stemming from your IP, it doesn't guarantee improved inbox placement or delivery uplift. Several factors beyond IP reputation, such as content quality, sender reputation (including domain reputation), list hygiene, user engagement, proper email authentication (SPF, DKIM, DMARC), and potential blacklist listings, play crucial roles in determining email deliverability. Additionally, changes or potential inaccuracies in SNDS reporting itself can make the 'green' signal unreliable on its own.

Key opinions

  • SNDS Limitations: SNDS green status only reflects Microsoft's view of your IP and is not a comprehensive deliverability indicator.
  • Beyond IP Reputation: Content, engagement, authentication, and list quality significantly impact deliverability, regardless of IP status.
  • Potential SNDS Issues: Recent trends suggest potential changes or inaccuracies in SNDS reporting, leading to a uniformly 'green' status even with delivery problems.
  • Engagement Matters: Low engagement and spam complaints negate the positive effect of a clean IP.

Key considerations

  • Evaluate Content: Check content quality, spam trigger words, and ensure the emails are mobile optimized.
  • Verify Authentication: Implement and verify proper email authentication protocols (SPF, DKIM, DMARC).
  • Check Blacklists: Investigate if your IP or domain is listed on any public blacklists.
  • Improve List Hygiene: Segment your email list and target engaged users to minimize spam complaints.
  • Monitor Sender Reputation: Monitor sender reputation from all sources not just Microsoft's SNDS.
  • Optimize Email Design: Ensure your emails are well-designed, with clear CTAs and easy-to-read text.
Marketer view

Email marketer from EmailonAcid recommends testing your emails across different email clients and devices to identify any rendering issues or spam trigger words that could negatively impact deliverability, despite a good IP.

August 2021 - EmailonAcid
Marketer view

Email marketer from SendGrid recommends even if your IPs are clear to ensure your emails are designed well with clear CTAs and easy to read text.

July 2024 - SendGrid
Marketer view

Email marketer from Gmass shares that if you're seeing green IPs and still poor delivery metrics, focus on segmenting and targeting engaged users. Sending to unengaged users increases your spam complaint rate and impacts your sender reputation even with a good IP.

December 2023 - Gmass
Marketer view

Email marketer from email.geeks.chat shares that a green IP in SNDS only means Microsoft isn't seeing any immediate red flags from your IP. Content, sender reputation, and user engagement are equally important for inbox placement.

April 2023 - email.geeks.chat
Marketer view

Email marketer from Email Geeks working for an ESP shares they are noticing all green IPs for about a week, before which they had seen at least one customer IP in yellow almost every day, suggesting Microsoft might have made a change.

December 2023 - Email Geeks
Marketer view

Email marketer from Email Geeks confirms every IP is green and thinks that IPs having issues are not displayed in the SNDS data altogether, at least that is their impression from the last week or so.

February 2022 - Email Geeks
Marketer view

Email marketer from Reddit explains that even with a green IP, poor list hygiene, irrelevant content, or low engagement can significantly impact deliverability, leading to emails landing in spam folders despite a good IP reputation.

September 2022 - Reddit
Marketer view

Email marketer from Email Geeks saw a spike in nearly all green IPs (>99.9%) starting December 9, it has not abated and the SNDS FAQ filter color definitions remain the same. They haven't seen this mass filter color change correspond to any uplift in delivery or inboxing/engagement.

August 2024 - Email Geeks
Marketer view

Email marketer from Mail সেন্ডার suggests even if your IPs are green it does not mean your emails will land in the inbox. Content should be checked against spam filters, and sender reputation from other areas might be hindering your mail.

September 2024 - Mail সেন্ডার
Marketer view

Email marketer from Litmus shares that even with a green IP, emails that aren't mobile-optimized can result in poor user experience, leading to increased deletion and spam reports which hurt future deliverability.

August 2022 - Litmus
Marketer view

Email marketer from StackOverflow recommends checking if your IP address or domain is listed on any public blacklists, as this can override a positive SNDS status and significantly impact deliverability.

March 2021 - StackOverflow
Marketer view

Email marketer from Mailjet highlights that proper email authentication (SPF, DKIM, DMARC) is essential for establishing trust with mailbox providers. Even with a clean IP, failing authentication checks can hurt deliverability.

September 2023 - Mailjet

What the experts say
8Expert opinions

Experts suggest that a green status in SNDS is not a reliable indicator of deliverability. While it means Microsoft isn't currently seeing policy violations from your IP, other factors such as content quality, list hygiene, sender reputation, and engagement are crucial. Furthermore, SNDS provides a limited view, mainly reflecting user complaints, and might not accurately represent actual filtering status. Sending practices resembling those of spammers, such as poor authentication or failing to handle unsubscribes properly, can also negate a positive SNDS status.

Key opinions

  • SNDS Unreliable: SNDS colors may not accurately reflect filtering status and can be misleading.
  • Limited View: SNDS provides a narrow view of sender reputation, primarily focusing on user complaints.
  • Practices Matter: Sending behaviors similar to spammers can negatively impact deliverability, even with a green IP.
  • Comprehensive Approach: Overall sender reputation, content, and engagement are critical for deliverability, not just IP status.

Key considerations

  • Authentication: Ensure proper email authentication (SPF, DKIM, DMARC) to build trust with mailbox providers.
  • List Hygiene: Maintain clean email lists and target engaged users to minimize spam complaints.
  • Sender Reputation: Monitor sender reputation across all channels, not just SNDS.
  • Complaint Monitoring: SNDS data should be used as a starting point to help monitor for complaints.
  • Unsubscribes: Ensure one-click unsubscribe options are offered and unsubscribe are processed in a timely manner.
  • Content Quality: Create relevant, engaging, and valuable content and do not engage in sending tactics that could be viewed as spam.
Expert view

Expert from Spam Resource explains that a green status in SNDS doesn't guarantee inbox placement. It simply means Microsoft isn't seeing any policy violations or technical issues originating from your IP address *at that moment*. Other factors like content, list quality, and sender reputation heavily influence actual delivery.

August 2022 - Spam Resource
Expert view

Expert from Email Geeks mentions a client with all green IPs was blocked at Microsoft the entire time, suggesting SNDS color may not reflect actual filtering status.

June 2024 - Email Geeks
Expert view

Expert from Word to the Wise highlights that SNDS data provides a limited view of your overall sender reputation and provides a starting point for analysis. A green IP can be misleading if you're not also monitoring other key metrics like engagement rates, spam trap hits, and blacklist listings. Focus on building a positive sender reputation across all channels, not just relying on SNDS for validation.

February 2022 - Word to the Wise
Expert view

Expert from Word to the Wise shares a core consideration to be whether or not your sending habits look like a spammers – not properly authenticating email, sending email to bad addresses, not offering one-click unsubscribe options, and not processing unsubscribes in a timely manner can all have a negative impact on your deliverability, even if your IPs are green.

February 2025 - Word to the Wise
Expert view

Expert from Email Geeks shares she has heard through the grapevine that Microsoft is looking at improving SNDS reporting, but believes the colors are still a lie, but maybe a little less of a lie.

April 2021 - Email Geeks
Expert view

Expert from Spam Resource explains it’s important to remember that SNDS is primarily a feedback loop about complaints. The data is meant to show you issues related to your mailing practices that are triggering user complaints, but a 'clean' SNDS report doesn’t automatically equate to perfect inboxing. Poor list hygiene, sending irrelevant content, or simply sending too frequently can cause users to mark messages as junk, even if your infrastructure is properly configured and your IP has a green status. This negative feedback then influences filtering decisions regardless of SNDS.

April 2021 - Spam Resource
Expert view

Expert from Email Geeks concludes that the SNDS colors are still a lie based on the conversation.

November 2024 - Email Geeks
Expert view

Expert from Email Geeks says they seem to have an IP in SNDS where yesterday is yellow and all previous days are green, and looking at another ESP’s IPs, they do see some with a mix of yellow and green over the past week, implying it is not everyone in the world going all green.

January 2024 - Email Geeks

What the documentation says
4Technical articles

Documentation from various sources highlights that a green status in Microsoft's SNDS only indicates the absence of immediate IP-related issues triggering filtering, but it does not ensure inbox placement or delivery uplift. Holistic sender reputation (including domain reputation), adherence to SMTP standards, authentication practices (SPF, DKIM, DMARC), content quality, sending volumes, spam complaint rates, and engagement metrics are all crucial factors for email deliverability.

Key findings

  • SNDS is Not Enough: A green SNDS status alone doesn't guarantee inboxing.
  • Holistic Reputation: Sender reputation is more than just IP; domain reputation, authentication, and engagement are key.
  • Technical Standards: Adherence to SMTP standards is crucial for deliverability.
  • Engagement Driven: Inbox providers have outlined the best practices of consistent sending volumes, low complaint rates and ensuring to authenticate your mail.

Key considerations

  • Full Deliverability Audit: Ensure proper email authentication (SPF, DKIM, DMARC).
  • SMTP Standard Compliance: Verify adherence to SMTP standards and formatting guidelines.
  • Sending Volumes and Complaint Rates: Maintain consistent sending volumes and work to minimize spam complaints.
  • Evaluate Sender Reputation: Ensure that sender and domain reputation are consistently monitored to ensure there are no blacklisting alerts.
Technical article

Documentation from RFC explains that SMTP standards require adherence to specific formatting and protocol guidelines. Deviation from these standards can lead to deliverability issues even with a clean IP.

October 2024 - RFC-Editor
Technical article

Documentation from Microsoft explains that a green status in SNDS indicates that your IP address is not currently exhibiting any problems that would trigger filtering. However, it does not guarantee inbox placement, as other factors like content and engagement also play a role.

December 2023 - Microsoft
Technical article

Documentation from SparkPost explains that sender reputation, encompassing IP reputation but also domain reputation, authentication practices, and engagement metrics, is crucial for deliverability. A green IP is just one piece of the puzzle.

March 2025 - SparkPost
Technical article

Documentation from Google Postmaster Tools outlines best practices for sending emails to Gmail users, emphasizing the importance of consistent sending volumes, low spam complaint rates, and properly configured authentication records, even with a good IP reputation.

February 2025 - Google