If you are a marketer or you have a list of your client’s email. You need to make sure those customers are still using those emails. 1 option is to send them an email and find out if the email gets delivered. bulk mail verifier That option is risky as if you have thousands of emails and if you get few bounce backs. You will end up losing your domain reputation and all your emails will be marked as spam. 2nd method is to clean the lis