During email verification we remove any duplicates from your file, we check email syntaxes, check the email servers DNS, create an SMTP connection with the recipients' server to find out if the email accounts exist. We check if the server is set to catch all mail. We do this without sending an email to your contacts.
We also detect catch all servers and temporary email addresses, and highlight free and role email accounts.
What is SMTP connection
SMTP is the very same process that is used to send an email. We are connecting with the recipients' servers and initiate an SMTP connection to find out whether an email account exists.
The only difference is that we abort the connection as soon as we find out if the email account exists and we never send an email.
We are incredibly proud of our outstanding accuracy hence we are the only email verifier offering 100% money back guarantee on our results.