Summary
Our last 2025 webinar focused on how to recover your email deliverability after high-volume campaigns. Large-scale email campaigns—such as those during Black Friday and Cyber Monday—can pose serious challenges to deliverability. Even experienced marketers may see emails landing in spam folders, open rates declining, and bounce rates rising.
Webinar how to recover your email deliverability after high-volume campaigns
The December 9, 2025 webinar, hosted in partnership with Bouncer, tackled a critical challenge: how to recover email deliverability after high-volume campaigns.
The session explored how to identify deliverability issues, understand their root causes, and implement actionable recovery strategies.
Pierre Pignault, CEO of MailSoar, and Radek Kaczynski, CEO of Bouncer, joined as expert speakers, sharing their insights and discussing this crucial topic.
These takeaways are essential for marketers looking to maintain inbox placement and maximize engagement after peak periods.
If you didn’t register to attend the live webinar, you can watch the replay or read this summary of the key takeaways. This post highlights the key lessons from the webinar, ‘How to Recover Your Email Deliverability After High-Volume Campaigns.’ It provides a step-by-step recovery plan to help you restore your sender reputation, improve engagement, and maintain inbox placement after periods of peak activity.
Understanding Email Deliverability Problems: Identifying Symptoms vs. Root Causes
Before you can successfully recover your email deliverability, it’s essential to understand the difference between visible symptoms and underlying root causes.
Deliverability issues often resemble an iceberg:
Visible symptoms may include:
- Recipients are reporting emails landing in the spam folder.
- Low open rates or a drop in open rates.
- High bounce rates (specially soft bounces).
Root causes often lie beneath the surface and can include:
- Poor domain or sender reputation (both a cause and a symptom).
- Unengaged or inactive email lists.
Sudden spikes in email volume.
Inadequate audience segmentation. - Sending too many invalid recipients (list hygiene in general).
- Too many spam reports for your mailing program to be viable.
By recognizing the visible symptoms, marketers can identify which email service providers (Gmail, Microsoft, Yahoo, etc.) require attention and take targeted steps to address the underlying issues, restoring inbox placement and improving engagement.
Why do you often need to recover email deliverability after high-volume Black Friday campaigns?
Discover the four leading causes you need to address to recover email deliverability after high-volume campaigns.
- High Spam rates and negative engagement
- High spam complaints usually correspond with higher unsubscribe rates.
- Recommended threshold: Spam rate < 0.3% (7-day moving average).
- Poor Segmentation Leading to Low Open Rates.
- Sending emails to inactive or unengaged contacts decreases open rates and increases spam risk by making your emails look less relevant due to the lack of activity on it.
- Recommended threshold: ≥ 35% unique open rate per provider.
- High Bounce Rates
- Often caused by invalid emails or poorly maintained segments.
- Separate soft and hard bounces.
- Recommended threshold: Bounce rate < 0.5%.
4) Volume Spikes
- Sudden large increases in sending volume can trigger spam filters.
- Solution: Gradually ramp up volume to avoid being flagged as suspicious.
Bonus: A step-by-step recovery plan to restore email deliverability after high-volume campaigns
Here’s a proposed step-by-step 4-week deliverability recovery plan to counter the effects of high-volume campaigns after Black Friday or other peak-season campaigns.
Week 1: Strict segmentation
- Target only the most engaged recipients (last 30–60 days of openers).
- Segment by provider if possible to address provider-specific issues.
Week 2: Reduce negative signals
- Identify campaigns with high unsubscribe rates (>0.5%).
- Pause or improve campaigns generating complaints.
- Clean your email lists to remove invalid, inactive, or toxic addresses.
Week 3: Stabilize engagement
- Maintain positive engagement while minimizing negative metrics.
- Keep open rates > 35%, unsubscribe rates < 0.5%, and spam rates < 0.3%.
- Establish consistent sending patterns to improve reputation with email providers.
Week 4: Monitor and scale
- Track your domain and IP reputation using Google Postmaster, Microsoft SNDS, or Yahoo Sender Hub.
- Review KPIs regularly to detect anomalies early.
Gradually increase email volume while maintaining engagement thresholds.
Recovering email deliverability after high-volume campaigns is always possible —even in severe cases
Key Email Deliverability Insights from Pierre Pinault, CEO of MailSoar, and Radek Kaczynski, CEO of Bouncer.
Recovery is always possible: Even severe deliverability issues can be corrected without abandoning your domain.
Engagement matters more than “spam words”: Modern filters focus on how users interact with your emails.
Use trends, not absolute numbers: Open and click rates may not be perfectly accurate, but trends reveal deliverability issues.
Preventive practices are essential: Maintain list hygiene, segmentation, and consistent sending patterns.
Balance risk and reach: During recovery, target your most engaged subscribers, then expand carefully once deliverability improves.
Conclusion
In the webinar—or in this article summarizing it—you discovered expert tips on how to recover your email deliverability after high-volume campaigns like Black Friday and Cyber Monday.
Recovering from post-Black Friday or Cyber Monday deliverability issues doesn’t require starting from scratch.
By following a structured, data-driven approach, you can restore your sender reputation, get back into inboxes, and ensure your future campaigns perform even better.
Remember: consistent engagement, careful segmentation, and monitoring are the keys to sustainable email deliverability.
Join our upcoming webinars to learn more about best practices and advanced strategies from the experts at MailSoar.
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