What you are sending, in many ways, is actually a postcard, and it's a postcard in the sense that everybody that sees it from the time it leaves your computer to when it gets to the recipient can actually read the entire contents.
某种意义上，更像是寄明信片， 因为从电邮离开你电脑的那一刻， 到收件人收到电邮的那一刻， 这其中能看到这封邮件的人， 能够浏览邮件的所有内容。