I get so many of these, that upon receiving the first one, I just immediately setup a filter to move everything from that sender into the Trash. They never have

I get so many of these, that upon receiving the first one, I just immediately setup a filter to move everything from that sender into the Trash. They never have an "unsubscribe" and they are always followed by a series of ever more desperate messages, so that's really the only way to keep them out of my inbox.