Double-check your upload type
Did you know? If you uploaded a list requiring contacts to reply "yes" to opt-in and then uploaded the same list again as previously opted-in contacts, then the system will wait for those contacts to reply "yes" from your first upload. Meaning that those contacts won't be added to a list until they reply "yes." Always double-check what type of upload is needed for your contacts. For more information, please view our upload guide by clicking here.
Have a great week!