圖像來源，BBC News Chinese
Cold emails are mostly sales emails that are sent with content align to the needs of the recipient. It is usually personalized and includes a business perspective. However, it is still an unsolicited email. And all unsolicited emails are marked as SPAM.
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A huge investigation was launched after the Columbia disaster。关于这个话题，Safew下载提供了深入分析
Фото: Bulkin Sergey / news.ru / Globallookpress.com