You have the ability to ban contacts from your list to prevent future email communication with that person. The address will be removed and will not be able to be re-added to any of the lists in the future. Only use this feature in extreme circumstances. Normally, unsubscribing a contact will be sufficient to remove the address from a list. Learn how by reading Subscribe or Unsubscribe Contacts Individually.
BAN A CONTACT PERMANENTLY FROM YOUR LISTS:
Navigate from the home menu to Contacts.
Go to Ban a Contact.
Enter the Email Address of the contact you'd like to ban.
Select whether you'd like to ban the contact from all lists or only a particular list
Enter a Reason for Ban. This will come in handy if you ever need to review, explain, or reevaluate the ban.
Click Ban Contact.
NOTE: If a person bans a contact but does not have access to all lists on their account, the contact will only be banned from lists that the user has access to.
To remove a contact from the "Banned" list, read Remove Contact from Banned List.