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MonsterMMORPG
Asked: 2012-03-11 08:28:51 +0800 CST

2 Received from header at IIS SMTP email send via C# application

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I am using windows server 2008 r2 and IIS 7.5 normally. I am using IIS 6 smpt server to send emails. Right now when i send email via my C# application i am seeing 2 received from headers. What might be the cause of this ?

Displaying both gmail and hotmail headers

gmail : 

Delivered-To: [email protected]
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: <[email protected]>
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 [email protected] 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 [email protected] designates 85.17.154.139 as permitted sender) [email protected]
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"
 <[email protected]>
To: [email protected]
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: [email protected]
Message-ID: <[email protected]>
X-OriginalArrivalTime: 10 Mar 2012 16:16:28.0941 (UTC) FILETIME=[26372BD0:01CCFED9]

hotmail headers

x-store-info:sbevkl2QZR7OXo7WID5ZcaZ0jeT0hTF6w5JqyzrMGIIJ4/L/t2gj2cA4gOeWpl7k+VkJUhAu0L19pcdx17/6zH+umIRUQcxNC7a6JMdOu4uk+atrpASsFAd6JPSp2WMA
Authentication-Results: hotmail.com; sender-id=temperror (sender IP is 85.17.154.139) [email protected]; dkim=none header.d=monstermmorpg.com; x-hmca=none
X-Message-Status: n:0:n
X-SID-PRA: MonsterMMORPG <[email protected]>
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"
 <[email protected]>
To: [email protected]
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: [email protected]
Message-ID: <[email protected]>
X-OriginalArrivalTime: 10 Mar 2012 16:20:03.0608 (UTC) FILETIME=[A62AC180:01CCFED9]

If you check you will see that there are 2 received from headers. Let me also show how do i send email and my smtp server config

This is how i send email C#

            MailMessage mail = new MailMessage();
            mail.To.Add(srEmail);
            mail.From = new MailAddress("[email protected]", 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);

This is IIS server config

enter image description here

Thanks a lot for the help

windows email smtp iis-7.5 smtp-headers

1 Answers

  1. Best Answer

    You get one Received header for every SMTP server that handles your message. In your case you get one when your application connects via SMTP to localhost and injects the message for the first time, and a second header when that IIS system passes the email to the server for HotMail or GMail.

    This is absolutely normal, and expected.

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