I don't think anyone in this thread is claiming it's illegal; however, it could be considered unethical and, at a minimum, highly annoying. Also, many times the

I don't think anyone in this thread is claiming it's illegal; however, it could be considered unethical and, at a minimum, highly annoying. Also, many times the "unsubscribe" links do nothing more than generate a new email to the same sender, which in my opinion is often used to verify leads.