包裹发送者不得而知，并且它是通过一家希腊公司邮递的，该消息人士称。

The sender of the package was unknown, and it was mailed via a Greek company, the source said.

youdao

但是安全公司现在在识别垃圾邮件发送者的输出模式方面已经有所进步。

But security firms have now got better at spotting patterns in the spammers' output.

youdao

原因之一是从检测无意义的电子邮件到识别发送者的地址，网络安全公司在每一个环节都尽心尽力地工作，因此他们阻止了超过98%的垃圾邮件发送到目标者的邮箱中。

One reason is that online-security firms have worked on every bit of the chain, from the content of junk emails to their sender, with the result that they stop more than 98% from reaching its target.

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