Email verification

Email Bounce Predictor

Estimate how likely an email address is to bounce from syntax, live MX and reputation signals, as a bounce-risk percentage. Free, using live DNS.

Predict email bounce risk

Enter an email address. We estimate how likely it is to bounce from syntax, live MX and reputation signals.

Features

Estimates bounce likelihood per address
Checks syntax and live MX records
Weighs disposable, typo and no-MX signals
Expresses the result as a bounce percentage
Shows every contributing factor
Runs live over DNS

Common use cases

  1. 1Deciding whether to email a risky address
  2. 2Cutting bounces before a campaign
  3. 3Prioritising addresses to re-verify
  4. 4Protecting sender reputation
  5. 5Screening inbound leads
  6. 6Estimating list-wide bounce exposure

Related tools

Email Risk ScorerEmail Quality ScorerEmail Bounce Rate CalculatorEmail Address ValidatorBulk Email VerifierSMTP error code lookup

About bounce prediction

A bounce happens when a mail server rejects your message — most often because the address is malformed, the domain has no mail server, or the mailbox does not exist. The first two are detectable before you send, and they cause the majority of avoidable bounces.

This predictor turns the real signals — syntax, live MX resolution, disposable and typo detection — into an estimated bounce risk percentage. It is a prediction, not a guarantee: it cannot see whether a specific mailbox is full or has been deleted (that needs an SMTP probe), so use it to catch the obvious bounces early and pair it with a mailbox check for high-stakes sends.

More Free Tools Where This Came From

This utility is one of dozens of free, no-login tools for DNS, email, SEO and developers — all instant and private.

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HostCloud.in  ·  Pune, India  ·  Serving 34,987+ Websites Since 2020

FREQUENTLY ASKED QUESTIONS

Got Questions? We Have Answers.

How does it predict bounces?

It combines the detectable causes of bounces — bad syntax, no MX record, disposable domains, likely typos — into an estimated bounce-risk percentage.

Is the prediction a guarantee?

No. It cannot see whether a specific mailbox is full or deleted (that needs an SMTP probe), so it catches the avoidable bounces, not every one.

Why prevent bounces?

High bounce rates get you throttled or blacklisted. Screening risky addresses first protects sender reputation.

Is the MX lookup live?

Yes. It resolves the domain's MX records over DNS-over-HTTPS in real time.