Email Deliverability & Bounce Rate Calculator
Turn one send's numbers into a delivery rate, hard and soft bounce rates, and a complaint rate. Each is judged only against thresholds a provider actually publishes.
Your send
Everything you handed to your sending platform for this campaign or period.
Accepted by the receiving server. Leave blank and it's derived as sent minus bounces.
Permanent failures: the address does not exist, or the domain does not accept mail.
Temporary failures: mailbox full, server busy, greylisted, deferred.
Recipients who hit “report spam”. Google Postmaster Tools and your ESP's feedback loop both report this.
Your rates
Enter your send numbers to see the rates.
Enter the number of messages you sent and the rates appear here. The numbers you type are not sent anywhere: the whole calculation runs on this page, and there is no API route behind it.
How to read these against provider rules
- Denominators differ. Google measures spam rate in Postmaster Tools against mail delivered to Gmail. Amazon SES measures complaints against mail sent to domains that return feedback, and counts only permanent failures in its bounce rate. This tool divides complaints by delivered and bounces by sent, so treat the result as close to what a provider sees, not identical to it.
- Thresholds are per provider, not per industry. Google and Yahoo publish a spam-rate ceiling. Amazon SES publishes bounce and complaint levels it acts on. Microsoft publishes sender requirements but no numeric complaint threshold. Nobody publishes an industry-standard bounce rate, which is why you will not find one on this page.
- Rates are half of the bulk-sender rules. Google and Yahoo also require SPF, DKIM and DMARC on domains sending 5,000 or more messages a day to their users. Check yours with the free email security score.
Which of these rates has a published threshold
Two of the four do. That is the whole reason two rows above carry a verdict and two do not.
| Metric | Who publishes a threshold | The number | What happens at it |
|---|---|---|---|
| Delivery rate | Nobody | — | No verdict shown. Acceptance by the receiving server is not inbox placement. |
| Hard bounce rate | Amazon SES | 2% · 5% · 10% | Under 2% is SES's advice for best results; 5% puts the account under review; sending may be paused at 10%. |
| Soft bounce rate | Nobody | — | SES excludes temporary failures from the rate it enforces on, and Google's deferral guidance is to reduce volume rather than hit a number. |
| Spam complaint rate | Google, Yahoo, Amazon SES | 0.3% · 0.3% · 0.1% | Google requires bulk senders under 0.3% and recommends under 0.10%; Yahoo publishes the same 0.3%; SES reviews from 0.1% and may suspend from 0.5%. |
Sources
Every threshold on this page comes from one of these three pages. Where a source is silent, the rate above carries no verdict.
- Google · Email sender guidelines (read 2026-08-13)
- Yahoo · Sender best practices (read 2026-08-13)
- Amazon Web Services · Amazon SES sending review process FAQs (read 2026-08-13)
Clean rates still fail bulk-sender rules without authentication
SPF, DKIM and DMARC are required alongside these numbers. Palisade's agent investigates every sender for you, drafts the fixes, and proposes each policy step. Nothing ships until you approve it.
Check my authentication1 domain free up to 1,000 emails/month
What is an email deliverability calculator?
An email deliverability calculator turns the raw counts from one send into the four rates mailbox providers pay attention to: delivery, hard bounce, soft bounce and spam complaint. The arithmetic takes seconds. The part most calculators get wrong is the verdict, because they attach an industry-standard threshold to every metric, and for most of these metrics no such standard exists. This one only judges a rate when a named provider publishes the number, and says so plainly when nobody does. Once the rates look right, the other half of the bulk sender rules is authentication: check yours with the email security score, or send a real message through the email deliverability test to see where it lands.
How do you calculate email bounce rate?
Email bounce rate is bounced messages divided by messages sent, times 100. Send 50,000 messages and have 600 come back as permanent failures, and the hard bounce rate is 1.2%. That single line is the whole formula, and it is what the email bounce rate calculator above runs. The judgement is the harder half. Enter hard and soft bounces in separate fields, because Amazon SES counts only permanent failures in the rate it enforces on, and merging the two produces a number no provider uses. For what drives the figure up and how to bring it down, read the guide to email bounce rate and how to reduce it.