How do I recover domain reputation after a sudden high volume email send to unengaged users?

Summary

Recovering domain reputation after a sudden high-volume email send to unengaged users involves several crucial steps. Initially, halt sending to the problematic list. The reputation drop stems from increased volume, potential complaints, and sending to invalid addresses. Implement a gradual warm-up, increasing volume incrementally, and avoid drastic volume shifts. Segment your email list based on engagement, focusing on re-engaging active subscribers and cautiously reintroducing unengaged users. Maintain consistent sending volume over time. Regularly clean your email list by removing inactive subscribers. Ensure email authentication with SPF, DKIM, and DMARC. Employ feedback loops and monitor your performance using Postmaster Tools. Sudden changes are not liked by spam filters. Sender reputation, domain age and email volume affect your sender score. Finally, consider the content and identify and deal with complaint problems.

Key findings

  • Immediate Cessation: Halt sending to the problematic list to prevent further damage.
  • Gradual Warm-up: Implement a slow and controlled warm-up strategy for your IP or domain.
  • Engagement Segmentation: Segment your audience based on engagement levels for tailored campaigns.
  • Consistent Volume: Maintain consistent sending patterns to build trust with mailbox providers.
  • List Hygiene: Regularly clean your email list to improve deliverability metrics.
  • Authentication: Set up SPF, DKIM, and DMARC to verify your email's authenticity.
  • Volume: Sudden high volume can set off alarm bells with spam filters

Key considerations

  • Targeted Re-engagement: Focus on re-engaging active subscribers before expanding to unengaged users.
  • Feedback Loops: Utilize feedback loops to identify and remove problematic addresses.
  • Performance Monitoring: Use tools like Google Postmaster Tools to track deliverability performance.
  • Complaint Analysis: Analyze complaints and identify reputation problems.
  • Content Auditing: Audit content to ensure your content is not causing deliverability problems
  • Valid Addresses: Remove old addresses or non-existent addresses

What email marketers say
10Marketer opinions

Recovering domain reputation after a sudden high-volume email send to unengaged users involves several key strategies. Primarily, it's crucial to avoid sending to unengaged users. Segmenting your email list based on engagement levels allows for targeted re-engagement campaigns for inactive users. Warming up your IP address or domain is essential, starting with small email volumes to engaged users and gradually increasing it. Authenticating your emails with SPF, DKIM, and DMARC is also a key element. Maintaining list hygiene by removing unengaged subscribers helps prevent low engagement rates, which can lead to spam flagging. Monitor metrics to ensure a positive reputation.

Key opinions

  • Warming is Key: Warming up your IP/domain is critical to re-establish trust with mailbox providers.
  • Segment & Re-engage: Segmenting and re-engaging subscribers helps improve engagement metrics and reputation.
  • Authentication Matters: Email authentication (SPF, DKIM, DMARC) ensures deliverability.
  • List Hygiene is Crucial: Maintaining a clean email list prevents spam flagging and boosts engagement.
  • Cautious Reintroduction: When reintroducing unengaged users, do so slowly and monitor metrics closely.

Key considerations

  • Engagement Segmentation: Carefully segment your audience based on engagement levels to tailor sending strategies.
  • Gradual Volume Increase: Increase email volume gradually to avoid triggering spam filters.
  • Authentication Setup: Ensure SPF, DKIM, and DMARC records are properly configured.
  • List Cleaning Frequency: Regularly clean your email list to remove inactive subscribers.
  • Monitoring Metrics: Continuously monitor engagement metrics to assess the effectiveness of your recovery efforts.
Marketer view

Email marketer from Email Geeks shares that it's best to warm up to large volume sends if you haven't sent that volume in the past or consistently over time.

May 2024 - Email Geeks
Marketer view

Email marketer from Hubspot explains that it is important to clean your email list from subscribers who no longer engage with your business, as a low engagement rate can result in emails being flagged as spam.

February 2022 - Hubspot
Marketer view

Email marketer from Reddit explains that to re-warm a domain, focus on sending emails to active users and segmenting out unengaged users to help build a positive reputation.

October 2023 - Reddit
Marketer view

Email marketer from ActiveCampaign shares that segmenting your email list based on engagement is critical. Create segments for highly engaged users, moderately engaged users, and unengaged users. Tailor your messaging and sending frequency to each segment to maximize engagement and minimize negative impact on your reputation.

August 2022 - ActiveCampaign
Marketer view

Email marketer from Mailjet shares that after a reputation drop, it is critical to warm up your IP address. This involves starting with a small volume of emails to your most engaged users and gradually increasing the volume over time. This shows mailbox providers that you're a legitimate sender.

January 2025 - Mailjet
Marketer view

Email marketer from Email Geeks advises to introduce the best-of-the-rest first. Slowly. So first the ones with historic clicks. Then the ones with historic opens. Then the ones with historic deliveries. And only then, if you feel like gambling the reputation again, the non-engagers. Very, very slowly.

February 2025 - Email Geeks
Marketer view

Email marketer from Campaign Monitor shares that it is important to authenticate email so it can be delivered to your customer's inboxes by having SPF, DKIM, and DMARC records in place.

October 2021 - Campaign Monitor
Marketer view

Email marketer from Reddit suggests immediately suppressing the unengaged segment that caused the reputation hit and focusing on sending to your active users. Then, slowly reintroduce the unengaged segment with extreme caution, closely monitoring metrics.

August 2024 - Reddit
Marketer view

Email marketer from SendGrid shares that to recover your domain reputation, focus on re-engaging your existing subscribers. Segment your list and target inactive users with personalized re-engagement campaigns. This helps improve engagement metrics and shows mailbox providers that you're sending to users who want your emails.

January 2023 - SendGrid
Marketer view

Email marketer from Gmass explains to warm up your email address by sending a small number of emails and gradually increasing it over time, so that your email is not flagged as spam.

January 2024 - Gmass

What the experts say
8Expert opinions

Recovering from a domain reputation drop after a sudden high-volume email send to unengaged users requires a multi-faceted approach. Primarily, stop sending to the problematic list immediately. The drop is likely due to the volume spike and potential mailing of non-existent addresses. Gradual warm-up is crucial - avoid significant volume shifts overnight. Consider trickling out mail over time, increasing volume by no more than 10% daily during warm-up. IP warming might be necessary if it's a new IP or hasn't been regularly used. Remember spam filters are sensitive to sudden changes. Domain age, sender reputation and email volume affect your sender score, segment the audience, re-engage subscribers, and don't wildly increase the volume.

Key opinions

  • Stop Sending: Immediately cease sending to the problematic list to prevent further damage.
  • Gradual Warm-up: Warm up the domain gradually, avoiding drastic volume increases.
  • Segment & Re-engage: Segment your audience and attempt to re-engage subscribers before large sends.
  • Volume Sensitivity: Spam filters are sensitive to sudden changes in email volume.
  • Reputation Factors: Sender reputation, domain age, and email volume affect your sender score.

Key considerations

  • Mailing List: Carefully identify and suppress unengaged subscribers or those who don't exist.
  • Daily Volume Cap: Monitor daily email volume and avoid multi-order of magnitude increases.
  • IP Warming: Determine if IP warming is necessary based on IP history.
  • Content Quality: Check the content for possible problems, or reputation issues.
  • Complaint Monitoring: Complaint levels from users have a significant negative effect.
Expert view

Expert from Word to the Wise, Laura Atkins, shares that sender reputation, domain age, and email volume all play into your overall sender score and deliverability. A sudden increase to email volume without a strong sender reputation will result in a lower score. If possible, you should segment your audience, and attempt to re-engage subscribers before sending to the entire list.

March 2024 - Word to the Wise
Expert view

Expert from Email Geeks advises considering trickling out mail over time after warming the domain up and not exceeding a 10% increase in volume day over day unless in the middle of a warmup schedule.

November 2021 - Email Geeks
Expert view

Expert from Email Geeks explains how to recover: 1. Stop sends to that list. 2. Go back to what you were doing before. 3. If you want to mail your whole userbase, start slowly and warm up the domain; don't go for a multi-order of magnitude shift in volume overnight.

September 2023 - Email Geeks
Expert view

Expert from Email Geeks says to keep volume on the low end for a few days and start an IP warmup between 5k and 10k sends, saying the poster should be ok.

August 2021 - Email Geeks
Expert view

Expert from Email Geeks states that the spam filter is jumpy, suspicious, protective of its users, and really doesn’t like sudden changes.

August 2021 - Email Geeks
Expert view

Expert from Email Geeks suggests that the Google drops are likely due to the swift increase in volume and possible attempts to mail addresses that don't exist triggering alarms. Recovery can be quick with a good sending history.

August 2023 - Email Geeks
Expert view

Expert from Word to the Wise, Laura Atkins, responds that IP warming is necessary to regain reputation if you are starting a new IP or haven't been using an IP regularly, but it isn't the only way, especially if the issue is content-based, or a reputation hit from complaints.

October 2023 - Word to the Wise
Expert view

Expert from Email Geeks explains the drop in reputation is likely due to the massive increase in volume and potentially related to complaints.

February 2023 - Email Geeks

What the documentation says
5Technical articles

Recovering from a domain reputation drop after a high-volume email send to unengaged users involves gradual volume increases, consistent sending habits, and meticulous list hygiene. Monitor sending performance using Postmaster Tools. Regularly remove inactive subscribers to improve deliverability and reduce spam complaints. Implement feedback loops to handle user complaints promptly. Employ DMARC policies to protect your domain from spoofing and phishing attacks.

Key findings

  • Gradual Volume Increase: Incrementally increasing sending volume minimizes negative impact on reputation.
  • Consistent Volume: Maintaining consistent sending habits supports a good sender reputation.
  • List Hygiene: Regularly cleaning email lists improves deliverability and engagement.
  • Feedback Loops: Feedback loops enable prompt handling of user complaints.
  • DMARC Policies: DMARC policies defend against domain spoofing and phishing attempts.

Key considerations

  • Postmaster Tools: Regularly monitor performance using tools like Google Postmaster Tools.
  • Inactive Subscribers: Set a schedule to remove inactive subscribers from your mailing lists.
  • Complaint Handling: Establish clear procedures for handling feedback loop complaints.
  • DMARC Implementation: Set up and enforce DMARC policies to protect your domain.
  • Bounce Rates: Maintain a low bounce rate by removing invalid email addresses.
Technical article

Documentation from SparkPost emphasizes the importance of list hygiene in maintaining sender reputation. Regularly remove inactive subscribers and those who haven't engaged with your emails in a long time. This helps reduce bounce rates and spam complaints, improving your deliverability.

January 2023 - SparkPost
Technical article

Documentation from Google Postmaster Tools Help explains that if you recently increased your sending volume, follow the best practices in these guidelines to gradually increase sending volume and monitor your performance with Postmaster Tools.

December 2021 - Google Postmaster Tools Help
Technical article

Documentation from Microsoft explains that consistent volume is important for maintaining a good sender reputation. Sudden spikes can negatively impact your reputation and deliverability.

April 2021 - Microsoft
Technical article

Documentation from RFC says to use feedback loops which allow email service providers to forward complaints from users about specific emails, so that senders can remove addresses from their mailing list.

October 2022 - RFC-Online
Technical article

Documentation from Cloudflare says to use DMARC policies to improve deliverability, as DMARC shows what actions to take on emails when SPF or DKIM checks fail, which can stop phishers and spammers from impersonating your domain.

April 2021 - Cloudflare