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by somid3 3336 days ago
Because you can also unsubscribe by replying "unsubscribe if there is no link. Part of CAN-SPAM.
1 comments

CAN-SPAM likely doesn't apply to the message in the first place, but even if it did it does not specifically require that you can unsubscribe by replying. That's just an example of one method they can provide.
True. I was testing. They provide no method to unsubscribe.