Want to improve your inbox placement? Check out the official A.I. emailing scoring documentation and learn how to measure the value of your email leads.


  • What is ZeroBounce A.I.?

  • ZeroBounce A.I. combines a vast selection of data with proven statistical analysis to granularity rate the quality level of an email address. The software identifies positive and negative patterns of an email address and returns a score that users can rely on when performing their email hygiene. The methodology of ZeroBounce A.I. periodically adjusts as email trends evolve.

  • When should you use our AI Email Scoring?

  • After you clean your email list with ZeroBounce, you can further validate your list of catch all emails. We strongly recommend validating your catch-all emails since they can't be validated during the normal validation process.

  • What should you expect to get after you score your email list?

  • After you score your email file through our A.I. you will get a .csv file back with an added column where you will find the Quality Score of the email.

  • How does the A.I. Score Emails?

  • Think about how an automatic trading software system would work. When should you buy stocks in a company? When should you sell? It's the same principle.

  • Does the ZB A.I. store or share any data with any 3rd parties?

  • The A.I. does not store or cache any data and does not share any data with anyone.

  • How should you interpret or use the scoring results?

  • Based on customer feedback, the higher quality score (QS), the higher the email engagement and the lower bounce rate.

Below is an example of an email list of all catch-all domains:
  • QS: 0 has an average bounce rate of 40%
  • QS: 1 has an average bounce rate of 35%
  • QS: 2 has an average bounce rate of 30%
  • QS: 3 has an average bounce rate of 25%
  • QS: 4 has an average bounce rate of 20%
  • QS: 5 has an average bounce rate of 7%
  • QS: 6 has an average bounce rate of 6.5%
  • QS: 7 has an average bounce rate of 5%
  • QS: 8 has an average bounce rate of 3.5%
  • QS: 9 has an average bounce rate of 2%
  • QS: 10 has an average bounce rate of 1.3%


Let's say you have a 100k email list that you need to validate and score via ZeroBounce. You first validate the file via the normal process of removing all invalid emails (API or bulk upload).

Let's say your email validation results look like this:

  • 43% Valid
  • 25% Catch-all
  • 18% Invalids
  • 2% Abuse and Traps
  • 2% Do Not Mail

Normally, you should only email the Valid file. With ZB A.I. you can now start mailing also the catch-all files, starting with QS 10 and working your way down from that until you decide that the bounce rate is no longer acceptable.

We recommend to never send emails to emails that have a quality score of 0.

Keep in mind a quality score of 0 doesn't mean the email is invalid, they can be spam traps, they can be inactive emails, they can be disabled emails and many other reasons. Our A.I. determined them to be very low-quality emails that will have much lower engagement collectively then high scoring emails.

Emails that score high, tend to have much higher engagement. Think about it, if an ESP sees people opening your emails, engaging with your email. You reputation improves and thus your in-boxing improves.

  • Our ZB Guarantee only applies to Email Validations and does not extend itself to our A.I Scoring system.