Email Bounce Rate Calculator
Calculate your hard and soft bounce rates instantly. Determine whether your sending domain is at risk of blacklisting or ESP suspension.
Your bounce rate is between 2% and 5%. You are experiencing increased spam folder placement and your ESP may throttle sending speeds.
How to reduce bounce rate to < 1%?
Pre-verify your mailing list before sending. MailVeri removes invalid mailboxes, disposable addresses, and catch-all domains in minutes.
Need to verify more than one email?
Our free web tools are great for single quick checks. For cold outreach, email marketing, or database cleaning, use MailVeri Bulk.
| Feature | Bounce Rate Calculator | MailVeri Bulk Engine |
|---|---|---|
Syntax & Domain MX Check Detects typos & non-existent domains | ||
Deep SMTP Handshake Pings recipient mail server directly without sending email | ||
Catch-All & Disposable Detection Catches temporary mailboxes & risky accept-all domains | ||
Spam Trap & Honeypot Filtering Protects domain reputation from blacklists | ||
Processing Speed High-speed distributed verification queue | 1 email / lookup | 100,000 emails / ~30 mins |
Batch File Upload Auto-detects email columns with zero setup | Up to 1,000,000 rows (CSV, XLSX, TXT) | |
Trial & Expiration No credit card required | Manual lookups only | 1,000 Free Credits • Never expire |
Why Combine DNS Audits & Bulk Verification?
Fixing SPF, DKIM, DMARC, and MX records protects your outbound domain authentication, while scrubbing your recipient list removes dead mailboxes, catch-all risks, and spam traps that trigger hard bounces and ESP account suspensions.
Keep Hard Bounce Rates Below 2%
Google Workspace, Microsoft 365, and Yahoo enforce strict sender thresholds. Verifying cold outreach and newsletter lists—including isolating catch-all domains without paying $800/100K—keeps your hard bounce rate safely below 2% and protects your sender reputation.
Up to 90% Cheaper List Hygiene
Legacy email verification tools charge $400 to $649 per 100,000 credits. MailVeri delivers 99%+ accuracy starting at $0.0002 per email ($59 per 100K / $299 per 1M non-expiring credits)—see how our rates compare against MillionVerifier, ZeroBounce & NeverBounce, DeBounce, Reoon, and EmailListVerify.
Bounce Rate Calculation & Threshold FAQs
Read How to Reduce Email Bounce RateHow is email bounce rate calculated?
Divide total bounced emails (hard bounces + soft bounces) by total emails sent, then multiply by 100. For example, 500 bounces out of 25,000 sent equals a 2.00% bounce rate—see our SMTP 4xx vs 5xx Bounce Codes Guide.
What bounce rate triggers ESP account suspension?
Keep your hard bounce rate strictly under 2%. Exceeding 2–5% triggers throttling on Gmail and Microsoft 365, while exceeding 5% triggers automated suspension on Amazon SES (see our AWS SES, Postmark & Resend Guide). Pre-verifying lists with the MailVeri Email Verifier ($59/100K) filters out invalid and catch-all mailboxes before you send.