给你邮件地址可以判断来自哪个国家吗？比如 peter.lowe@yahoo.com,

在Foxmail或OutlookExpress中都可以查看邮件源文件（如实在不知道如何查看将邮件另存为eml格式，
用记事本打开也行）各种Webmail中也都有“查看信头”的功能。
邮件每经过一次MX服务器都会留下记录，查看最下面的也就是最原始的，一般来说这样是可以找到邮件源头的。
如：
X-Uidl: GmailId11b98b5d531d7008&&popgmailcom
Delivered-To: zhangsan@gmailcom
Received: by 1012515611 with SMTP id i11cs141664mko;
Wed, 6 Aug 2008 08:50:00 -0700 (PDT)
Received: by 101431684 with SMTP id v4mr64290wfo391218037798147;
Wed, 06 Aug 2008 08:49:58 -0700 (PDT)
Return-Path: <notice-return-ibxisu84173bxw7t@actionnetworkorg>
Received: from iron3actionnetworkorg (iron3actionnetworkorg [65160234163])
by mxgooglecom with ESMTP id 29si10619130wfg020080806084955;
Wed, 06 Aug 2008 08:49:58 -0700 (PDT)
Received-SPF: pass (googlecom: domain of notice-return-ibxisu84173bxw7t@actionnetworkorg designates 65160234163 as permitted sender) client-ip=65160234163;
Authentication-Results: mxgooglecom; spf=pass (googlecom: domain of notice-return-ibxisu84173bxw7t@actionnetworkorg designates 65160234163 as permitted sender) smtpmail=notice-return-ibxisu84173bxw7t@actionnetworkorg
Received: from unknown (HELO AOLserver omail6) ([19216817156])
by iron3actionnetworkorg with SMTP; 06 Aug 2008 08:48:09 -0700
从这里可以看出，邮件最初是由局域网发送至iron3actionnetworkorg的SMTP服务器的，此服务器又将邮件转发
给了gmail的邮件服务器。查询65160234163得知邮件由美国发送过来

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