Question: Suppose you are the director of an ISP that serves the email needs of 10,000 customers. You receive dozens of complaints from them every week about the amount of spam they are receiving.
Meanwhile, American spammers are hacking into computers in Jamborea (an East Asian country) and using them to mail spam back to the United States. You estimate that at least 99 percent of email originating from Jamborea is spam.
A few of the messages, however, are probably legitimate emails. Should you do anything to restrict the flow of email messages from Jamborea to your customers?
Can somebody provide the answer for given question with example?