And believe me, you'll need a fully populated whitelist to protect your valid mail from the spam filter's depredations.

相信我，您必须将白名单填得满满的，才能免受垃圾邮件过滤器干掉之灾。

youdao

Panda erred in the opposite direction, blocking hardly any valid mail but letting more than half the undeniable spam into the Inbox.

熊猫却在相反方向在犯错，几乎没阻挡有用的邮件，但却让超出一半的明显的垃圾邮件进入收件箱。

youdao

After it processed all the mail, I manually separated the Inbox messages into undeniable valid mail, undeniable spam, newsletters (valid but not personal), and "other."

在它处理所有邮件后，我手动将收件箱里的明显的有用邮件，垃圾邮件，简报(有用但不是个人邮件)和“其它”分开来。

youdao

Even reputable news sites often only check that the e-mail address you have given is valid, but make no effort at all to verify that you are who you claim to be online.

BBC: Microsoft wants to change passwords for something better

Travelocity and the FAA recommended printing out a copy of the reservation receipt, which could be an e-mail message, although it was unclear what would constitute a valid receipt.

CNN: FAA imposes restrictions on e-tickets

Apple has eliminated all (valid) complaints about iOS (notifications, computer dependency and the anemic mail application being the biggest ones), launched a free mail, contacts and calendar server for all iOS and Lion users, and promoted iOS devices to be computer-independent, all while delivering the biggest concession from the music industry we have seen so far in a side-note.

FORBES: Apple's WWDC Announcements: A Lot to Like, but no Death Blow