Gmail Paper?是一个愚人节的玩笑吗？
Everyone loves Gmail. But not everyone loves email, or the digital era. What ever happened to stamps, filing cabinets, and the mailman? Well, you asked for it, and it’s here. We’re bringing it back.
Is it free?
Yes. The cost of postage is offset with the help of relevant, targeted, unobtrusive advertisements, which will appear on the back of your Gmail Paper prints in red, bold, 36 pt Helvetica. No pop-ups, no flashy animations—these are physically impossible in the paper medium.
。。。。。。
http://mail.google.com/mail/help/paper/
无论这是不是Gmail一个愚人节玩笑，至少在我看来，这条路是能赚钱的。
怎么保证我的信件没有被偷看？