factors that would cause you to be more or less convinced that a particular email message was authentic. Which of the more convincing factors from your list would have been present in the example of the South Korean diplomatic secrets?

What will be an ideal response?

A legitimate email address domain that is known to belong to the sender; a look and feel that is consistent with the sender; links that goonly to the sender’s website. It is probable that the domains in the South Korean case were similar to the legitimate ones but were not the actual legitimate ones.