What is Email Lookup?

Email lookup, also known as either Email checker or Email verifier, is a very fast, highly accurate and free lookup tool that allows you, through the verification process in stages to determine the existence of email. The check-in process takes place through the following steps:

  • First, our tool resolve host name (SMTP server) to IP address
    from Email that you are checking and then try to connect to that SMTP server via port 25 (it is standart Simple Mail Transfer Protocol port for sending mails).

    For example the hostname of the email [email protected] is mmxint01.1and1.com and it resolve to the IP address If the connection is successful, our checker tool will start check your email using the verification procedure.
  • How does the email verification process work?

  • The process of checking mail is done by sending SMTP HELLO command to other side (SMTP server) asking server to verify searched email address.
    Once SMTP server accept our request and our "question" then he let us know of Mail ID / Recipient is OK or NOT.
  • The final step of the whole validation process is to show you the response from the SMTP server after the verification process is complete:
    "the host states that the address is valid or not."

    Once we get answer we disconnect from SMTP server.

Email lookup is sophisticated tool for checking and testing Email addresses. It is possible to check email addresses for validity and decide which email is 'dead' and which one is 'alive'. If you are looking for trustworthy, free email service to check emails from your mailing list then you will be very happy with this tool.
Also keep in mind that if you dont have an email you'd like to check and want to find email for a specific domain, you always have our other two tools at your disposal: IP / DNS lookup and Whois Lookup, where you can enter a domain to check and if the email is publicly available, then our tool will show you the result of your request.