BounceProtect
Clean your email lists before you send
What is a good email bounce rate and how to reduce it
Industry benchmarks for bounce rates and the most effective ways to keep yours low.
What is an email bounce rate?
Your bounce rate is the percentage of sent emails that could not be delivered. High bounce rates damage your sender reputation and can get your domain or IP blacklisted by email providers.
Bounce rate benchmarks
| Rate | Assessment |
|---|---|
| Below 2% | Healthy — industry standard |
| 2–5% | Caution — investigate your list quality |
| Above 5% | Critical — pause sending and clean your list |
Most ESPs (Mailchimp, HubSpot, Klaviyo) will suspend accounts that exceed 5% bounce rate.
Hard vs soft bounces
Hard bounces are permanent failures — the email address doesn't exist, the domain is invalid, or the server permanently rejects delivery. These addresses must be suppressed immediately.
Soft bounces are temporary failures — the mailbox is full, the server is down, or the message was too large. These can be retried but should be monitored.
How to reduce bounce rates
- Validate before you send — run your list through email validation before every campaign
- Never buy lists — purchased lists have bounce rates of 20–50%+
- Use double opt-in — confirmed signups almost never bounce
- Remove inactive addresses — addresses that haven't engaged in 12+ months are likely stale
- Validate in real time — validate email addresses at the point of capture on forms
How BounceProtect helps
BounceProtect validates every email against 10+ signals before you send. Invalid addresses, domains with no mail servers, and addresses rejected by SMTP are flagged as Do Not Send — removing them before they ever hit your bounce rate.
Ready to validate your email list?
Start free and check your first emails with full validation signals and SMTP verification.