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网友有时会收到主题为“Returnedmail:User unkowli”或“Mail system error-returned mail”之类的电子信件,表明你发出的信件被退回,这是什么原因呢?你不妨从以下几个方面来分析: 仔细阅读退回信件的信头,往往退
Users sometimes receive e-mail with the subject of “Returnedmail: User unkowli” or “Mail system error-returned mail,” indicating that the mail you sent is returned. What is the reason? Several aspects to analyze: Carefully read the letter returned the letter, often retreat