2 從通過 C# 應用程序發送的 IIS SMTP 電子郵件的標頭接收

我正常使用 windows server 2008 r2 和 IIS 7.5。我正在使用 IIS 6 smpt 伺服器發送電子郵件。現在，當我通過 C# 應用程序發送電子郵件時，我看到從標題中收到 2。這可能是什麼原因？

同時顯示 gmail 和 hotmail 標頭

郵箱：

Delivered-To: mypersonalemail@gmail.com
Received: by 10.112.29.167 with SMTP id l7csp43703lbh;
       Sat, 10 Mar 2012 08:16:29 -0800 (PST)
Received: by 10.14.127.12 with SMTP id c12mr1026618eei.19.1331396188791;
       Sat, 10 Mar 2012 08:16:28 -0800 (PST)
Return-Path: <noreply@monstermmorpg.com>
Received: from noreply.monstermmorpg.com (noreply.monstermmorpg.com. [85.17.154.139])
       by mx.google.com with ESMTP id f41si4528441eeo.146.2012.03.10.08.16.27;
       Sat, 10 Mar 2012 08:16:28 -0800 (PST)
Received-SPF: pass (google.com: domain of noreply@monstermmorpg.com designates 85.17.154.139 as permitted sender) client-ip=85.17.154.139;
Authentication-Results: mx.google.com; spf=pass (google.com: domain of noreply@monstermmorpg.com designates 85.17.154.139 as permitted sender) smtp.mail=noreply@monstermmorpg.com
Received: from XCPV002 ([127.0.0.1]) by noreply.monstermmorpg.com with Microsoft SMTPSVC(7.5.7601.17514);
    Sat, 10 Mar 2012 16:16:28 +0000
MIME-Version: 1.0
From: "MonsterMMORPG"
<noreply@monstermmorpg.com>
To: mypersonalemail@gmail.com
Date: 10 Mar 2012 16:16:28 +0000
Subject: =?utf-8?B?UG9rZW1vbkNyYWZ0IGRhaGEga2FsaXRlbGkgYmlyIG95dW4g?=
=?utf-8?B?b2xhcmFrIGdlcmkgZMO2bmTDvC4gRXNraSBoZXNhYsSxbsSxeiBkdXJ1?=
=?utf-8?B?eW9yLg==?=
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: base64
Return-Path: noreply@monstermmorpg.com
Message-ID: <XCPV002ednHM3SOlbpH0004e7c7@noreply.monstermmorpg.com>
X-OriginalArrivalTime: 10 Mar 2012 16:16:28.0941 (UTC) FILETIME=[26372BD0:01CCFED9]

hotmail 標頭

x-store-info:sbevkl2QZR7OXo7WID5ZcaZ0jeT0hTF6w5JqyzrMGIIJ4/L/t2gj2cA4gOeWpl7k+VkJUhAu0L19pcdx17/6zH+umIRUQcxNC7a6JMdOu4uk+atrpASsFAd6JPSp2WMA
Authentication-Results: hotmail.com; sender-id=temperror (sender IP is 85.17.154.139) header.from=noreply@monstermmorpg.com; dkim=none header.d=monstermmorpg.com; x-hmca=none
X-Message-Status: n:0:n
X-SID-PRA: MonsterMMORPG <noreply@monstermmorpg.com>
X-DKIM-Result: None
X-AUTH-Result: NONE
X-Message-Delivery: Vj0xLjE7dXM9MDtsPTA7YT0xO0Q9MTtHRD0xO1NDTD0w
X-Message-Info: NhFq/7gR1vQcnWpWXvTdSPoVLSrfQUf9NNYiD+nue1hb767bbTKXz+tuMD66iU4vKsnCmrISnMcViv7BRc8FinIdJij0qRdzfb9MQFyl8Qnq2jH2yHHz6W3BUjjFUEclGZIdpMuV4EQ=
Received: from noreply.monstermmorpg.com ([85.17.154.139]) by BAY0-MC3-F1.Bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4900);
    Sat, 10 Mar 2012 08:20:03 -0800
Received: from XCPV002 ([127.0.0.1]) by noreply.monstermmorpg.com with Microsoft SMTPSVC(7.5.7601.17514);
    Sat, 10 Mar 2012 16:20:03 +0000
MIME-Version: 1.0
From: "MonsterMMORPG"
<noreply@monstermmorpg.com>
To: mypersonalemail@hotmail.com
Date: 10 Mar 2012 16:20:03 +0000
Subject: =?utf-8?B?UG9rZW1vbkNyYWZ0IGRhaGEga2FsaXRlbGkgYmlyIG95dW4g?=
=?utf-8?B?b2xhcmFrIGdlcmkgZMO2bmTDvC4gRXNraSBoZXNhYsSxbsSxeiBkdXJ1?=
=?utf-8?B?eW9yLg==?=
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: base64
Return-Path: noreply@monstermmorpg.com
Message-ID: <XCPV002DreBBsQwY6YH0004e7c9@noreply.monstermmorpg.com>
X-OriginalArrivalTime: 10 Mar 2012 16:20:03.0608 (UTC) FILETIME=[A62AC180:01CCFED9]

如果您檢查，您將看到從標頭收到 2 個。讓我也展示一下如何發送電子郵件和我的 smtp 伺服器配置

這就是我發送電子郵件 C# 的方式

           MailMessage mail = new MailMessage();
           mail.To.Add(srEmail);
           mail.From = new MailAddress("noreply@monstermmorpg.com", srSender);
           mail.Subject = srEmailTitle;
           mail.Body = srEmailBody;
           mail.IsBodyHtml = true;
           mail.SubjectEncoding = System.Text.Encoding.UTF8;
           mail.BodyEncoding = System.Text.Encoding.UTF8;
           SmtpClient smtp = new SmtpClient();
           smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
           smtp.UseDefaultCredentials = true;
           smtp.Host = "127.0.0.1";
           smtp.Port = 25;
           smtp.Send(mail);

這是 IIS 伺服器配置

非常感謝您的幫助

Received您為每個處理您的郵件的 SMTP 伺服器獲得一個標頭。在您的情況下，當您的應用程序通過 SMTP 連接到 localhost 並第一次注入消息時，您會得到一個，當 IIS 系統將電子郵件傳遞到 HotMail 或 GMail 的伺服器時，您會得到第二個標題。

這是絕對正常的，也是意料之中的。

引用自：https://serverfault.com/questions/368347