(DataFlex) Create DSN (Delivery Status Notification) Email

Demonstrates how to create a DSN (Delivery Status Notification) Email having the format as defined in RFC 3464.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoEmail
    Boolean iSuccess
    Handle hoXml
    String sXmlStr
    Boolean iBHeaderOnly
    String sHumanReadableExplanation
    Variant vDsnEmail
    Handle hoDsnEmail
    String sTemp1
    Boolean bTemp1

    Get Create (RefClass(cComChilkatEmail)) To hoEmail
    If (Not(IsComObjectCreated(hoEmail))) Begin
        Send CreateComObject of hoEmail
    End

    // A DSN email is a report about the attempt to delivery 
    // an email.  It is usually a report that indicates failure or
    // or a delay in delivery.  The DSN is typically sent back to
    // the sender of an email.

    // IMPORTANT:
    // Note: Please be careful in sending automated DSN'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 CreateDsn method will be called to create a new
    // DSN email based upon the email object calling CreateDsn.
    // The email object instance used to call CreateDsn 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 DSN for "someEmail.eml"
    Get ComLoadEml Of hoEmail "someEmail.eml" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoEmail To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // The DSN created by CreateDsn will contain a 
    // "message/delivery-status" MIME sub-part that will
    // be composed of a number of name-value pairs.
    // See RFC 3464 ( http://tools.ietf.org/html/rfc3464 )
    // The name-value content for this part is passed
    // as XML to CreateDsn. This part of the example
    // prepares the XML:
    Get Create (RefClass(cComChilkatXml)) To hoXml
    If (Not(IsComObjectCreated(hoXml))) Begin
        Send CreateComObject of hoXml
    End

    // For this example, we're just adding a few name-value pairs.
    // These should not be considered to be correct, required or
    // even sensible -- it's simply for the example.  
    Set ComTag Of hoXml To "DeliveryStatusFields"
    Send ComNewChild2 To hoXml "Status" "5.1.2 (bad destination system: no such domain)"
    Send ComNewChild2 To hoXml "Diagnostic-Code" "smtp; Permanent failure: no such domain"
    Send ComNewChild2 To hoXml "X-BounceCategory" "bad-domain"

    Get ComGetXml Of hoXml To sXmlStr

    // The last argument to be passed to CreateDsn will be a boolean
    // indicating whether to include the entire MIME of the calling
    // email object in the DSN, 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 DSN header-only.
    Move True To iBHeaderOnly

    // The first argument to be passed to CreateDsn will
    // be a human-readable explanation that will be placed
    // into the 1st MIME part of the DSN (see RFC 3464).
    Move "Blah blah blah. The delivery of this email failed. Blah blah blah" To sHumanReadableExplanation

    // OK, we're ready to create DSN....

    Get ComCreateDsn Of hoEmail sHumanReadableExplanation sXmlStr iBHeaderOnly To vDsnEmail
    If (IsComObject(vDsnEmail)) Begin
        Get Create (RefClass(cComChilkatEmail)) To hoDsnEmail
        Set pvComObject Of hoDsnEmail To vDsnEmail
    End
    Get ComLastMethodSuccess Of hoEmail To bTemp1
    If (bTemp1 = False) Begin
        Get ComLastErrorText Of hoEmail To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Show the MIME of the source (original) email:
    Get ComGetMime Of hoEmail To sTemp1
    Showln sTemp1

    Showln "**************************************"

    // Show the MIME of the DSN email:
    Get ComGetMime Of hoDsnEmail To sTemp1
    Showln sTemp1

    Send Destroy of hoDsnEmail

    // Sample output showing the MIME of the original email,
    // and the DSN 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=delivery-status;
    // 	 boundary="------------070202040604030701060106"
    // 
    // --------------070202040604030701060106
    // Content-Type: text/plain
    // Content-Transfer-Encoding: 7bit
    // 
    // Blah blah blah. The delivery of this email failed. Blah blah blah
    // --------------070202040604030701060106
    // Content-Type: message/delivery-status
    // 
    // Status: 5.1.2 (bad destination system: no such domain)
    // Diagnostic-Code: smtp; Permanent failure: no such domain
    // X-BounceCategory: bad-domain
    // 
    // --------------070202040604030701060106
    // 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
    // --------------070202040604030701060106--
    // 
    // 


End_Procedure