Open source projects function almost wholly through e-mail (with the addition of the Apache bug tracking database, which you'll find in the Resources section).

开发源码项目几乎完全是通过电子邮件（再加上 Apache bug 跟踪数据库，在 参考资料 小节中有这方面的内容）来运作的。

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Rumor: Internet users can receive cash rewards from Bill Gates by forwarding an E-mail message to test a Microsoft tracking system.

流言：网络用户通过发送邮件帮助测试微软的跟踪系统，可获得比尔·盖茨的现金奖赏。

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It tells the user "thanks for your order" and sends e-mail with the package tracking number when the order ships.

它告知用户“谢谢订购”并且当订单传输的时候发送包含该包裹号码的电子邮件。

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"They all find out that you opened the mail and they get an invisible tracking number, so if you go to a store ... that number is reported to them and they can build that information into a database, " Catlett said.

CNN: Privacy groups ask FTC to close e-mail loophole

We continued to a backstage area where mail trucks shared space with production crews at banks of monitors tracking the party already under way, as well as Mr. Craig's progress.

WSJ: Setting Stages Fit for Bond

Audio Ads also enables advertisers to track when and where their ads ran soon after the fact, providing them with a faster and more accurate way of tracking their spots than the usual invoices they receive via snail mail.

FORBES