What Is Domain Reputation Protection?
Domain Reputation Protection is an automated safeguard that monitors your sending domains and protects them from being blacklisted by major email providers.
The system continuously tracks your bounce rate in real time. If bounce levels become risky, it automatically slows down or pauses sending to prevent long-term damage to your domain reputation.
What Is Domain Reputation?
Domain reputation is the level of trust email providers assign to your sending domain.
Email services such as Gmail, Outlook, and Yahoo analyze how you send emails and how recipients respond to them. Based on this evaluation, they decide whether your emails go to the inbox, the spam folder, or get blocked completely.
Your domain reputation is mainly affected by:
- Bounce rate
- Spam complaints
- Recipient engagement (opens and clicks)
- Overall list quality
A strong reputation improves inbox placement, while a poor reputation increases the risk of filtering or blocking.
Why Is Domain Reputation Important?
When too many emails bounce, mailbox providers may flag your domain as risky. As a result, future emails may land in the spam folder, get rejected, or cause long-term damage to your sending reputation. Recovering from this kind of impact can take weeks or even months.
Domain Reputation Protection helps prevent this by monitoring bounce rates every hour, automatically slowing sending at a 6% bounce rate, and pausing sending at 10%. It also displays clear warnings with recommended actions and tracks each domain independently, ensuring that an issue with one domain does not affect others.
Bounce Rate Calculation
Bounce Rate is calculated using a 30-day rolling window:
Bounce Rate = (Total Bounces in 30 Days ÷ Total Emails Sent in 30 Days) × 100
| Item | Description |
|---|---|
| Calculation Window | 30-day rolling period |
| Formula | (Total Bounces in Last 30 Days ÷ Total Emails Sent in Last 30 Days) × 100 |
| Example – Emails Sent | 10,000 |
| Example – Total Bounces | 500 |
| Example – Bounce Rate | (500 ÷ 10,000) × 100 = 5% |
| Update Frequency | Updated every hour |
| Rolling Logic | Bounces older than 30 days are automatically removed from the calculation |
| Improvement Condition | Bounce rate improves naturally if you continue sending to clean, valid email lists |
What You’ll See in the Dashboard
In the Dashboard, bounce-related metrics are clearly displayed in dedicated cards, including Hard Bounced and Soft Bounced. These counters show how many emails failed due to permanent issues (such as invalid addresses) and how many failed due to temporary problems (such as a full mailbox or server issue).
By monitoring these numbers regularly, you can quickly detect unusual spikes that may impact your domain reputation. A rising hard bounce count usually indicates list quality issues, while repeated soft bounces may signal temporary delivery problems that need attention.
If bounce levels increase beyond safe thresholds, the system may automatically throttle or pause sending from the affected domain to protect your reputation. Keeping an eye on these dashboard metrics helps you take action early and maintain healthy deliverability.
How It Works
1. Active (0%–6% Bounce Rate)
Your domain is considered healthy. Emails are sent at full speed, and no action is required.
2. Throttled (6%–10% Bounce Rate)
If your bounce rate crosses 6%, sending speed is automatically reduced to 30%. A warning badge appears in your dashboard, but you can still send emails.
At this stage, you should review your bounced emails under Deliverability > Bounces, remove invalid addresses, and correct any import errors. Once your bounce rate drops below 6%, full speed resumes automatically.
3. Paused (10%+ Bounce Rate)
If the bounce rate reaches 10% or higher, sending from that domain is paused completely. Bulk sends are blocked, and a clear error message explains what happened and what to do next.
To recover:
Review bounced addresses.
Remove invalid or low-quality contacts.
Wait for the hourly recalculation.
Once the bounce rate falls below 10%, send resumes automatically.
For best protection, many customers use separate subdomains for marketing and transactional emails (for example, marketing.yourdomain.com and transactional.yourdomain.com). This prevents marketing bounce issues from affecting critical transactional emails.
Best Practices for a Strong Domain Reputation
Maintaining a strong domain reputation requires consistent monitoring and smart list management. Follow these essential practices to protect your deliverability:
- Keep your bounce rate below 6% and investigate sudden spikes immediately.
- Use double opt-in for new subscribers to ensure valid and interested contacts.
- Validate email addresses before importing large lists.
- Avoid purchased or scraped email lists entirely.
- Send only to engaged and recently active users.
- Monitor bounce trends weekly to catch issues early.
Most importantly, never ignore bounce warnings. They are early signals designed to protect your domain before minor issues turn into serious deliverability problems.
Frequently Asked Questions
How long does a pause last?
Sending resumes automatically once your bounce rate drops below 10%. Recalculation happens hourly.
Can I disable Domain Reputation Protection?
No. This feature cannot be turned off because it protects your domain, your IP reputation, and the shared infrastructure used by all customers.
Does this affect transactional emails?
Yes, if they are sent from the same paused domain. Using separate domains for transactional and marketing emails is strongly recommended.
Will my bounce rate improve over time?
Yes. Because the system uses a 30-day rolling window, old bounces naturally expire. Consistent sending to clean lists will steadily improve your rate.
Domain Reputation Protection automatically monitors bounce rates in real time, throttles sending at 6%, pauses sending at 10%, and provides clear guidance to resolve issues before they harm your deliverability. By keeping your lists clean and responding promptly to warnings, you can maintain strong inbox placement and long-term domain health.
