Hello @DanS675 ,   Our system wouldn't really be able to tell you which emails aren't any good until you've actually tried to send an email to them. If you already know which ones are no good, I'd recommend clearing out your contacts, taking the bad ones out of the file you intend to upload, then redo the upload without those bad contacts.   Otherwise, you can send out the email, and then check the reporting for bounces. The bounce report will also have a Recommended for Removal category, so you can easily group those bounces we don't recommend keeping, then delete and unsubscribe them in one go. ... View more