Revalidation of Good Undelieverable Email addresses: We export your undeliverables, scan the list with an email verifier*, and re-validate the good email addresses. The bad email addresses will be unsubscribed so that Newsletters do not get sent to these addresses to prevent getting blacklisted, even if you were to add the email address again from another list. 

 

*The rate of email verification is $.05 per email address.