Hello @ChO ,   This would indicate that there's either an issue with the contacts (e.g. if they were previously in your account with no permission set or awaiting confirmation, deleting and re-uploading them may have them stuck in a Compliance lock), or with the list itself if it contains permission data.   One thing to note based on your post's wording and the events in your account, is that contacts that have only registered for a specific event, but have not opted into receiving your other emails (per the optional checkmark you can apply to your registration forms), will not have a set permission. Thus, they cannot be sent emails outside of the specific event they're registered for. This is an anti-spam compliance measure, and is how our event system has worked and will continue to work for events.    All that said, without being able to investigate the contact file further, we won't be able to confirm what the issue is with your imports and the contacts' permissions. I would advise calling support back (and consider updating your account's phone number beforehand so the VA recognizes it for quicker transfers), so our phone support can safely collect that file for further investigation. ... View more