Why rely on rexp-checks, when you can test on the live server? All this without actually sending an email or bothering users.

This API will supercharge your CRM tools by doing the following:

1. discover your lead’s email addresses form name and domain (e.g. leads found on linkedin)
2. validate if an email is correct by directly connecting to the mailserver.

It will not only check for a valid format and MX server, but will also confirm that the email is know on the recipient server. You can validate an email without actually sending an email.

In detail the following checks are made:

• Check for valid format
• Check if domain has MX entries
• Test if mailserver responds
• Connect to mailserver and test if email would be accepted. (won’t actually send an email)