Thank you for the feedback! We do have a way for you to add a list of unsubscribed addresses to the account, it is an advanced feature you are able to turn on. Click the link below to visit our FAQ with specific instructions:
https://knowledgebase.constantcontact.com/articles/KnowledgeBase/33118-Import-a-List-of-Unsubscribed-Contacts-into-Constant-Contact-from-Another-Provider
Hope this helps! Please continue to provide us with feedback and vote for other ideas you think would make the system even better. If you have questions don't hesitate to contact our support team for some additional help.
... View more