There may be cases when you don’t want to send emails to a set of subscribers that are distributed across all your lists but you still have to do campaigns on your lists. Mailfed offers a feature called “Email blacklist” that can be used exactly for this purpose. Go to Dashboard > Lists > Email blacklist and add the email addresses you want to blacklist there. You can even upload a csv file with such email addresses. No further mailing will be done to those email addresses/subscribers no matter on which list they’re present.