Email Verifier Script or Software

Hello, I am looking for someone that has a pre-built script or can create a script that will allow me to verify email addresses before sending them out. All I need to do is to be able to upload/import a list and then have the emails verified to see if they are good/bad or exist/not exist. I should then be able to export the good emails, delete the bad emails, etc. I would like to get this done ASAP. I will be testing your script with a list of good/bad emails that I already know. This way I can see how accurate your script is at verifying the email addresses. It should also remove duplicates fromt the list. Thanks, BCBC