Email Verification

  1. Help Center
  2. Frequently Asked Questions
  3. Email Verification
  • Is there a limit to the email addresses that I can verify?
    Yes, you can check up to 200 email addresses for a domain name every 24 hours. No other limitation applies to the email verification.
  • How many requests are counted for email verifications?
    Every verification counts as one request. With a free account, you can use up to 100 requests/month. If you need more, you can upgrade to the plan that suits your needs. Please check our pricing for more information.
  • How does the email verification work? Do you send an email to the email address?
    The email verification service performs multiple checks on the email. We validate the format and make sure it isn’t a temporary address or a webmail. Then we contact the mail server (without sending any emails) to make sure there is indeed an email inbox for the requested address.
  • Does an email marked “deliverable” have no chance of bouncing?
    The verifications are never totally sure, but it's safe to say that more than 95% of "deliverable" email addresses won't bounce.
  • What does the Email Verification tool do?
    The Email Verifier will take an email address and do a check on its deliverability (how likely it is to bounce or not from the mail server).
  • What does it mean when a server accepts all emails sent?
    This means that the server does not check to see whether the email address is necessarily valid (exists on the server). In this case, the email address is always marked as "risky" as we can't be sure it really exists.
  • What does it mean when an email address is flagged as “risky”?

    When an email address is tagged "risky", it means the server check seems to work, but we have reason to believe the email may not be read by anyone.

    This can happen in several cases, for example:

    • The email seems to be received, but the servers also seem to accept every email address.
    • The email seems to be received, but it looks like gibberish (for example "").
  • What do you check for when verifying emails?

    This is the list of verifications we do:

    • Valid format: First, we verify the format of the email address is correct and looks something like "".
    • Gibberish Email Address: We check to ensure the address doesn't look like a random email address. For example, doesn't pass the test.
    • Disposable Email Address: We check if the email address has a domain name used for temporary email addresses.
    • Webmail Email Addresses: We verify if the email address uses a webmail like Gmail or Yahoo.
    • Presence of MX Records: We check if there are MX records on the domain. If there aren't, the email address can't receive emails.
    • Presence of SMTP Server: This check is successful if we are able to connect to the SMTP server (indicated in MX records).
    • SMTP Check: We test the email address and see if it bounces or not.
    • Accept-all Domain: We check if the server has a catch-all policy which accepts all the email addresses.
  • Can I verify webmails addresses?
    Since Hunter is designed for professionals it does not verify webmails addresses such as,,, etc. Due to this, we suggest avoiding to process a list of webmails as they will be automatically removed during the email verification.
  • Is there a limit for the email addresses that can be verified in one single bulk?
    Yes, you can verify up to 10,000 email addresses for a single bulk.
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