I am skeptical that showing the sender address would prevent scams like this, because I suspect that relatively few people who would get tricked by this scam ar

I am skeptical that showing the sender address would prevent scams like this, because I suspect that relatively few people who would get tricked by this scam are likely to figure it out based on noticing the full sender address. I agree that more information is generally better, except that people often learn to ignore extraneous information in UIs, and in most cases the full address of the sender is not important. And what makes these scams successful may not be lack of information in the UI, but something else. For example, users not recognizing the significance of the sender's address, or not paying attention to it at all. People have never been good at recognizing email scams, which is why detecting them before they get into the user's inbox is the best solution I know of. The author may be right, but I would not take it for granted, and would want to see some research done to support this.