Verifying an email address

An email address can be verified by clicking the verification icon next to it in the Domain Search:

or by using the Email Verifier tool:

What checks are performed with the email verification?

Hunter runs several checks to make sure the best verification score is provided:

  • Format: we verify the format of the email address is correct and looks something like "". We also ensure the address doesn't look like a random email address. For example, won't pass the test.
  • Type: We check if the email address has a domain name used for temporary email addresses and we also verify if the email address uses a webmail like Gmail or Yahoo.
  • Server Status: We check if there are MX records on the domain. If there aren't, the email address can't receive emails. We also perform a SMTP check to see if we are able to connect to the SMTP server (indicated in MX records).
  • Email Status: We test the email address and see if it bounces or not and we check if the server has a catch-all policy which accepts all the email addresses.

How can I be sure an email is deliverable?

Running the emails that are gathered in Hunter or from other sources through the Email Verification functionality will give you an accurate indication of the deliverability status of the email.

The Email Verification can provide you different results:

Deliverable email: it means every information we got regarding the email was fine as it passed all our verification checks.

The checks for the format, type, sever status and email status passed. A deliverable email can also provide sources where it can be found on the web.

Accept all email: in this case Hunter can't be certain about the deliverability of the email as the domain associated with it won't allow to perform a full verification due to its accept all nature.

When an email address is tagged as accept all, it means the "email status" check have identified an accept all domain

Accept all domains are basically domains that are set up to accept all emails and, due to this we mark them in the verification section.

For example, in this case the domain “” is one of these types of domains. So, if we check we will always receive an “OK” response for any mailbox. This is why we cannot be sure the emails associated with them are valid.

Accept all emails do not use requests during the Email Verifier process.

Invalid email: the email did not pass one or more checks in the email verification and it is not deliverable.

In this case both the server and email status failed for the email, meaning the email will certainly bounce as it does not exist.

The Confidence Score

All the emails found in Hunter have a confidence score assigned which will provide you with a first overview of the "faith" an email will have. Simply hover the dot next to the emails found in the domain search to reveal the confidence score.

Email addresses with a confidence score of 90-95% or higher have a high chance of being fully deliverable although a high score does not guarantee a 100% fully deliverable email.

Providing an accurate and updated confidence score is our first priority: confidence scores are constantly updated to reflect the emails' deliverability.
To have a complete deliverability report we highly suggest running the emails that are gathered through the Email Verifier tool. 

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