How Does ZeroBounce Find Emails?
ZeroBounce finds business email addresses through a combination of company domain pattern detection and 99.6% accurate email validation. After determining several email address patterns that have a high confidence rating, those addresses undergo the email verification process to determine if the address is indeed valid, invalid, or another risky email type.
ZeroBounce offers two types of Email Finder searches - a domain-based search and a name-based search. The domain-based search attempts to discern the most likely email pattern in use. Compare this to a name-based search, which allows ZeroBounce to plug in the person's first and last name along with the domain to find a verified result.
How do domain-based email finderⓘ searches work?
A domain-based email finderⓘ search allows you to search for business email addresses by only providing the domain.
Often, your business knows that there are potential leads at a company that can benefit from your product, but you aren't sure how to contact someone. By providing a domain (their company name), you can find possible patterns for email addresses used by current employees.
Here's how it works:
- You enter the domain or company name.
- The ZeroBounce email finder uses proprietary technologies to search in real-time to search for possible patterns.
- The email finder returns a few possible results along with a corresponding confidence score. High confidence scores indicate that an email pattern is likely valid and used by people at the company.

Be aware that it's possible to receive several "High confidence" results as more than one email address pattern may be in use.
This type of search is a great way to look up emails for contacts you may already know. If you met "John Smith" at "Email Company" at a recent event, and a high confidence pattern recommends "first.last@company," his email is likely john.smith@emailcompany.com.
How does a name-based email finderⓘ search work?
A name-based email finderⓘ search uses the same elements as a domain search but is able to leverage the person's name for the address.
The process works like this:
- You enter a company domain, and the email finder searches for possible patterns.
- Once it has a selection of probable patterns, it adds the person's name appropriately to each pattern (i.e., john.smith@company, john@company, smith.john@company, etc.).
- Then, ZeroBounce uses email verification to determine the validity of each possible email address. The email finder continues searching and testing until it finds a valid result.
![Name-based ,[object Object], search results showing a valid email address for Swen Vincke: swen.vincke@larian.com.](/_next/image?url=%2Fassets_next%2Fdocs%2Ffaq%2FemailFinder2.webp&w=1920&q=75)
Similar to the domain email finderⓘ search, your results may still show multiple high-confidence patterns if the company uses alternate email address structures.
It's critical to note that ZeroBounce never uses stored or processed customer information for any email finderⓘ searches. Every instance of an email finderⓘ search occurs 100% in real time using internal proprietary technologies, including real-time email validationⓘ.
ZeroBounce will always be fully compliant with data privacy and security regulations, giving you the confidence that your data is always in safe hands.
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How does ZeroBounce ensure the accuracy of found emails?
What sources are used to enrich email data?
What Sources Are Used to Enrich Email Data?
As an added perk with ZeroBounce email verification, ZeroBounce uses third-party sources to add appended data to your emails regarding social, email domain, and geolocation factors.
ZeroBounce cannot disclose these data sources for privacy and competitive reasons but can guarantee that all provided information is reliable. In fact, the honesty and accuracy of enriched email data are demonstrated by the data appends success rate.
ZeroBounce's ability to enrich email data depends upon the availability of such information from its sources. When available, you can learn more about an email address, such as:
- The owner's name
- Gender
- Location
- The domain
- The domain age
- IP information
- Mx record information

Data appending is a free feature included with email verification but is entirely dependent on ZeroBounce's sources. If data can be retrieved, it will be included in your Overview report.
Does ZeroBounce use customer information to enrich email data?
No - ZeroBounce never uses stored or processed customer data for any of its email deliverability services or features. Any search for information occurs in real time and the retrieved data is only shared with you. All reports and files must be accessed with a unique encryption key that only you receive. Then, those files are deleted after 30 days from the platform.
To use customer data would be a significant violation of ZeroBounce's Privacy Policy.
You can learn more about their commitment to privacy by visiting their security page.
Is enriched data included with bulk email verificationⓘ?
When possible, additional data is appended to email addresses, whether you validate a single email address or an entire list.
If your email address data is enriched with a bulk file uploaded, you can find it by reviewing your CSV results files. Additional data columns may be added to your "Valid" results file as well as to any other applicable results. You can find also find appended data to your Overview report, which can provide a top-level look at the top geographic locations for your entire list.
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How Does ZeroBounce Find Emails?
How does ZeroBounce ensure the accuracy of found emails?
How Does ZeroBounce Ensure the Accuracy of Found Emails?
ZeroBounce ensures the accuracy of found emails with its guaranteed 99.6% accurate email validation. Any time you perform an email finder search with both a name and domain, ZeroBounce will continue to test and verify new patterns until it identifies a valid result.
Be aware that accuracy can only be assured with a name-based email finder search. If you perform a search with only the domain, ZeroBounce can only guess potential patterns.
How accurate is a "high confidence" score?
When searching for business emails with only a domain, a confidence score is attached to possible patterns used by that domain, discerned by various factors, including internal technologies and public records.
However, you should note that even a high confidence score is not a guarantee. It's possible that specific email address patterns, while valid, are outdated or used as a catch-all. You may be able to deliver a message to the address successfully, but you aren't guaranteed a response.
It's always recommended to verify any email address before sending a message. While the occasional bounced message is nothing to worry about, it quickly becomes problematic if you attempt to email many addresses that haven't been validated.
I received a valid email address; why do other patterns show "high confidence?"
If your email finderⓘ search delivers a valid email address, you can be confident in your result. Generally, the top email address pattern will match the pattern of your new business email.
But, your results may also show other patterns that also have a "high confidence" score. This doesn't mean that your email address is inaccurate but that ZeroBounce found other patterns on that domain that are also in use. The company may use multiple email structures, or they may have yet to do anything with otherwise unused email addresses.
ZeroBounce email verification has an accuracy guarantee
Finally, ZeroBounce ensures its accuracy with a money-back guarantee. If it determines an email address to be valid, it stands by its results. If, after using ZeroBounce, you find your email addresses to be invalid or experience a high bounce volume, please contact ZeroBounce support. The team is ready to work with you to determine the issue with your email finderⓘ results and will do what's necessary to make it right for you.