This is a free tool to validate an email address with smtp, it contacts mail server and ask for destination recipient and read responses.
It's a free online tool, an email validator built with
Minibots, a small PHP class to build spider and web bots.
This email checking tool connects to the mail server and checks whether the email exists. Use this tool freely to check an email address.
NOTE: This tool isn't working properly because there are no emails configured on this domain, so the majority of mail server consider these calls invalid.