Some "legit" senders only have a "snipe"-unsubscribe: you can only unsubscribe from a given "list", which often has just one message. When a new ad campaign oc

Some "legit" senders only have a "snipe"-unsubscribe: you can only unsubscribe from a given "list", which often has just one message. When a new ad campaign occurs, they create a new "list" and mail everyone again. This is spam.