Once you are in the 'API' tab, click 'Verify emails'.
To check an email list you must use the url present at the top of the method, and give the following parameters:
Email: the email to be checked via the API.
The API key: your API key attached to your account.
The API will then return a result that contains:
Smtp_check: Check the SMTP server of the given email, if true then the SMTP is valid.
Mx_found: MXs are valid if the data returned is true.
Catch_all: If the data is true then the mail server has a security that makes verification impossible.
Published on: 06 / 11 / 2017