Thanks for reaching out, and we understand that sometimes contacts unsubscribe by accident. If you have a sign-up form on your website, a contact can sign back up using that. If you don’t have a sign-up form on your website you can resubscribe a contact by sending a confirmation email. Just click Contacts, search for the contact you want to add back, and click the contact's name or email address to go into the contact record:
Then click Resubscribe:
You'll then need to select the list(s) you want to add the contact back to, check the permission box, and finally click Send Email.
Thank you for reaching out to us. If the resubscription email was sent and the contact has not received the email, you will need to reach out to our Account Review department to get the next steps you will need to take to reinstate the contact that you are currently having issues with. Click here for their contact phone numbers and hours of operation. Please let us know if there is anything else we can assist with today.