(VB.NET) Create MDN (Message Disposition Notification) Email

Demonstrates how to create a MDN (Message Disposition Notification) Email having the format as defined in RFC 3798.

Download: Chilkat .NET Assemblies

Dim email As New Chilkat.Email()

Dim success As Boolean

'  An MDN can be used to notify the
'  sender of a message of any of several conditions that may occur after
'  successful delivery, such as display of the message contents,
'  printing of the message, deletion (without display) of the message,
'  or the recipient's refusal to provide MDNs.
'  (for more information, see RFC 3798)

'  IMPORTANT:
'  Note: Please be careful in sending automated MDN's.
'  It is important to be aware of an issue called "backscatter".
'  See the Wikipedia article here:  http://en.wikipedia.org/wiki/Backscatter_%28e-mail%29

'  The CreateMdn method is called to create a new
'  MDN email based upon the email object calling CreateMdn.
'  The email object instance used to call CreateMdn would
'  typically be an email received from a POP3 or IMAP server.
'  In this case, to simplify the example, we'll load the email
'  from a .eml file.

'  This example will be creating a MDN for "someEmail.eml"
success = email.LoadEml("someEmail.eml")
If (success <> true) Then
    TextBox1.Text = TextBox1.Text & email.LastErrorText & vbCrLf
    Exit Sub
End If


'  The MDN created by CreateMdn will contain a
'  "message/disposition-notification" MIME sub-part that will
'  be composed of a number of name-value pairs.
'  See RFC 3798  ( http://tools.ietf.org/html/rfc3798 )
'  The name-value content for this part is passed
'  as XML to CreateMdn. This part of the example
'  prepares the XML:
Dim xml As New Chilkat.Xml()

'  For this example, we're just adding a few name-value pairs.
'  These should not be considered to be correct, required or
'  even sensible -- they are simply for the example.
xml.Tag = "DispositionFields"
xml.NewChild2("Disposition","manual-action/MDN-sent-manually; displayed")
xml.NewChild2("Original-Message-ID",email.GetHeaderField("Message-ID"))
xml.NewChild2("Final-Recipient",email.GetToAddr(0))

Dim xmlStr As String
xmlStr = xml.GetXml()

'  The last argument to be passed to CreateMdn will be a boolean
'  indicating whether to include the entire MIME of the calling
'  email object in the MDN, or only the header.
'  It may make sense to include the entire email for small emails,
'  but for large emails (with large attachments) it's probably
'  best to make the MDN header-only.
Dim bHeaderOnly As Boolean
bHeaderOnly = true

'  The first argument to be passed to CreateMdn will
'  be a human-readable explanation that will be placed
'  into the 1st MIME part of the MDN (see RFC 3798).
Dim humanReadableExplanation As String
humanReadableExplanation = "Blah blah blah.  Your message has been received and displayed. Blah blah blah"

'  OK, we're ready to create MDN...
Dim mdnEmail As Chilkat.Email

mdnEmail = email.CreateMdn(humanReadableExplanation,xmlStr,bHeaderOnly)

If (Not (mdnEmail Is Nothing )) Then
    '  Show the MIME of the source (original) email:
    TextBox1.Text = TextBox1.Text & email.GetMime() & vbCrLf

    TextBox1.Text = TextBox1.Text & "**************************************" & vbCrLf

    '  Show the MIME of the MDN email:
    TextBox1.Text = TextBox1.Text & mdnEmail.GetMime() & vbCrLf
Else
    TextBox1.Text = TextBox1.Text & email.LastErrorText & vbCrLf
End If





'  Sample output showing the MIME of the original email,
'  and the MDN email created based upon it:

'  
-

X-Account-Key: account2
X-UIDL: 0D154945439D42BD80F180F6D9DE4D82
Received: with MailEnable Postoffice Connector;
	 Tue, 21 Jun 2011 09:21:23 -0400
Received: from qmta14.emeryville.ca.mail.comcast.net ([76.96.227.212]) by chilkatsoft.com with MailEnable ESMTP;
	 Tue, 21 Jun 2011 09:21:22 -0400
Received: from omta03.emeryville.ca.mail.comcast.net ([76.196.30.27]) by qmta14.emeryville.ca.mail.comcast.net with comcast id yd4k1g0050b6N64AEdLW9x;
	 Tue, 21 Jun 2011 13:20:30 +0000
Received: from [127.0.0.1] ([67.175.202.103]) by omta03.emeryville.ca.mail.comcast.net with comcast id ydLV1g00n2EMkZ78PdLWxi;
	 Tue, 21 Jun 2011 13:20:31 +0000
Message-ID: <4E009AA4.3090205@chilkatsoft.com>
Date: Tue, 21 Jun 2011 08:20:36 -0500
From: Chilkat Software <admin@chilkatsoft.com>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.17) Gecko/20110414 Thunderbird/3.1.10
MIME-Version: 1.0
To: Chilkat Support <support@chilkatsoft.com>
Subject: test 123
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Return-Path: <>
X-Antivirus: avast! (VPS 110621-0, 06/21/2011), Inbound message
X-Antivirus-Status: Clean

This is a test 123



**************************************
Content-Type: multipart/report;
	 report-type=disposition-notification;
	 boundary="------------000802010206080606030808"

--------------000802010206080606030808
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

Blah blah blah.  Your message has been received and displayed. Blah blah blah
--------------000802010206080606030808
Content-Type: message/disposition-notification

Disposition: manual-action/MDN-sent-manually; displayed
Original-Message-ID: <4E009AA4.3090205@chilkatsoft.com>
Final-Recipient: support@chilkatsoft.com

--------------000802010206080606030808
Content-Type: text/rfc822-headers

X-Account-Key: account2
X-UIDL: 0D154945439D42BD80F180F6D9DE4D82
Received: with MailEnable Postoffice Connector;
	 Tue, 21 Jun 2011 09:21:23 -0400
Received: from qmta14.emeryville.ca.mail.comcast.net ([76.96.227.212]) by chilkatsoft.com with MailEnable ESMTP;
	 Tue, 21 Jun 2011 09:21:22 -0400
Received: from omta03.emeryville.ca.mail.comcast.net ([76.196.30.27]) by qmta14.emeryville.ca.mail.comcast.net with comcast id yd4k1g0050b6N64AEdLW9x;
	 Tue, 21 Jun 2011 13:20:30 +0000
Received: from [127.0.0.1] ([67.175.202.103]) by omta03.emeryville.ca.mail.comcast.net with comcast id ydLV1g00n2EMkZ78PdLWxi;
	 Tue, 21 Jun 2011 13:20:31 +0000
Message-ID: <4E009AA4.3090205@chilkatsoft.com>
Date: Tue, 21 Jun 2011 08:20:36 -0500
From: Chilkat Software <admin@chilkatsoft.com>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.17) Gecko/20110414 Thunderbird/3.1.10
MIME-Version: 1.0
To: Chilkat Support <support@chilkatsoft.com>
Subject: test 123
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Return-Path: <>
X-Antivirus: avast! (VPS 110621-0, 06/21/2011), Inbound message
X-Antivirus-Status: Clean
--------------000802010206080606030808--