A suppression list is a list of email addresses of users you want unsubscribed or blacklisted. Adopia allows you to load your suppression list(s), to prevent these blacklisted users from re-subscribing. 

Video Tutorial 

In your Adopia account, click Manage Suppression

Under Manage Suppressions click Add New Suppression List. In the Add Mask(s) in Suppression List pop up window enter your 

Suppression List NameChoose between Import from file, where you are able to load your suppression list file or select 

Enter Contacts in a box where you can enter the suppression contacts manually. 

Click Upload when finished.