Email Verification API

Email Verification API is an email validation tool that can check if a given email address exists, is valid, and can receive messages. The latter is performed using email-emulation techniques via the Simple Mail Transfer Protocol (SMTP). The API also ensures email address validity by checking syntax and mail server existence. These checks can help weed out invalid email addresses that can hurt your email marketing metrics.

To date, Email Verification API has verified more than 301 million email addresses, helping prevent over 18 million bounce backs.

Companies may need to further categorize their email lists even when an email address passes the validity and existence checks. Email Verification API checks explicitly whether the email address is created using any of the thousands of disposable email services, including 10MinuteMail, GuerillaMail, and Mailinator. This validation process helps companies offering freemium services avoid freemium abusers.

Email Verification API can also tell you if an email address is linked to a business account, which is handy for business-to-business (B2B) marketers who want to obtain business email addresses.

We have reduced the amount of coding needed by making Email Verification API available in different developer libraries—PHP, Node.js, Python, Flask, and Express.js. The API is also available as a Splunk application.

Note: Email Verification API is developed and managed by WhoisXML API, along with other API products, such as the WHOIS Lookup API, DNS Lookup API, and IP Geolocation API.