Free Email Bounce Rate Calculator

Enter your emails sent and total bounces to calculate your bounce rate and see how you compare to industry benchmarks.

Email Tester Inbox Placement Tester
Bounce Rate Calculator
This tool will calculate your bounce rate by taking the (Number of Emails Bounced) / (Total Emails Sent)
Emails Sent:
No. of Bounces:
Built with ♥ by Henry Timmes · Named contributor to RFC 7489 (DMARC)

Understanding Email Bounce Rates

Every email that fails to reach its destination counts against your sender reputation. Knowing the difference between a hard bounce and a soft bounce, and understanding what your rate means against industry benchmarks, is the first step to protecting your deliverability.

  1. Enter the total number of emails sent in your campaign
  2. Enter the number of bounced emails (hard and soft combined, or add both if tracked separately)
  3. Click "Calculate Bounce Rate" to see your percentage instantly
  4. Compare your result against the industry benchmarks displayed on screen
  5. If your rate exceeds 2%, review your list hygiene and authentication setup
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Hard Bounces

Permanent delivery failures caused by invalid addresses, nonexistent domains, or blocked accounts. Remove hard-bounced addresses from your list immediately after every send.

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Soft Bounces

Temporary failures from full inboxes, overloaded servers, or content filters. Most ESPs retry automatically. Repeated soft bounces on the same address signal a deliverability issue worth investigating.

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Benchmark Targets

Under 2% is healthy. Between 2% and 5% needs attention. Above 5% triggers ESP warnings and reputation damage. Above 10% can result in account suspension.

Tip: Track hard and soft bounces separately when your ESP provides that breakdown. Hard bounces above 0.5% usually point to a list quality problem, while high soft bounces often indicate authentication or content filtering issues.

Reducing Email Bounce Rates

Have you ever wondered why some emails fail to reach your audience? Keeping your email bounce rate low is crucial for maximizing deliverability and maintaining a strong sender reputation. Lower bounce rates ensure your messages are successfully delivered, increasing the likelihood of engagement and positive outcomes from your campaigns.


Bounce rates are influenced by two primary factors: hard bounces and soft bounces. Hard bounces, which occur due to invalid or non-existent email addresses, are typically cleaned from your list automatically after the first send. Soft bounces, however, result from issues like spam filter blocks, content or link restrictions, and temporary delivery problems. These require targeted strategies to address.


To reduce soft bounces, ensure your email complies with authentication standards like SPF, DKIM, and DMARC. Avoid flagged keywords and problematic links, optimize your email's content and design, and monitor spam filter feedback to adjust accordingly. Using tools like a Campaign Cleaner can help you identify and resolve potential issues before sending.


Regularly analyzing your bounce rates and identifying trends in delivery issues can provide valuable insights. Tools like Campaign Cleaner can help optimize your newsletter improving your overall email deliverability.

Email Bounce Rates

Improving Email Bounce Rates

OPTIMIZATION FACTORS IMPACT ON BOUNCE RATE
HTML Sanitization The HTML Sanitization tool removes problematic or malicious code, reducing the chances of being flagged as spam and lowering bounce rates due to server rejection.
Spam Trigger Prevention By avoiding spam trigger words, Spam Trigger Detection ensures your emails don't get filtered into spam, reducing the likelihood of soft bounces caused by spam filters.
Non-ASCII Character Replacement The Non-ASCII Character Replacement feature fixes rendering issues, preventing unprofessional appearances and also email server rejections that could lead to soft bounces.
Blacklist Link Checker Blacklist Link Checker helps you track the links. If blacklisted, emails may be rejected or filtered, causing high bounce rates. This feature allows you to resolve blacklist issues and maintain good deliverability.
SpamAssassin Scoring SpamAssassin Scoring runs your email through the same rules inbox providers use to score messages for spam. A high SpamAssassin score increases the likelihood of soft bounces caused by content-based filtering. Fixing flagged rules before sending keeps your score low and your delivery rates healthy.
Font Color Adjuster The Font Color Adjuster tool ensures that text in your emails are not using spammy colors like bright reds and greens. Emails that don't use flashy text colors are less likely to be flagged as spam and are less likely to bounce due to rendering issues.
Font Size Adjuster The Font Size Adjuster allows you to adjust the font size for optimal readability across devices. Proper font sizing can help prevent display issues that could cause soft bounces or trigger spam filters.
Successive Punctuation Adjustment The Successive Punctuation Adjustment tool addresses excessive punctuation, such as multiple exclamation marks, which can trigger spam filters. Proper punctuation improves your email's chances of reaching the inbox and reduces bounce rates.

Email Bounce Rate Questions and Answers

An email bounce rate is the percentage of emails that failed to deliver out of the total sent. It is calculated by dividing the number of bounced emails by the total sent and multiplying by 100. A bounce rate below 2% is considered healthy for most sending programs.

A hard bounce is a permanent delivery failure caused by an invalid email address, nonexistent domain, or blocked account. A soft bounce is a temporary failure caused by a full inbox, overloaded mail server, or content-based spam filter. Hard bounces must be removed from your list immediately; soft bounces are retried by most ESPs and suppressed after several consecutive failures.

A good email bounce rate is below 2%. Rates between 2% and 5% indicate list hygiene issues that need attention. Rates above 5% are high and can trigger account warnings from your email service provider. Rates above 10% signal a serious problem that requires immediate list cleanup and may result in account suspension.

Receiving mail servers track how many of your messages bounce. Consistently high bounce rates signal to inbox providers that you are not maintaining a clean list, which lowers your sender reputation score. A poor reputation results in more messages landing in spam or being blocked outright, reducing deliverability across all your campaigns.

To reduce hard bounces, use a double opt-in process to confirm new subscriber addresses, validate email addresses at the point of collection, remove hard-bounced addresses immediately after each campaign, and avoid purchasing email lists. Regularly audit your list to remove addresses that have not engaged in 12 or more months.

To reduce soft bounces, ensure your SPF, DKIM, and DMARC records are correctly configured, avoid spam trigger words and suspicious link patterns, keep your SpamAssassin score low, and monitor blacklist status for your sending domain and IP. Tools like Campaign Cleaner can help you identify and resolve content issues before you send.