(PureBasic) 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 PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkEmail.pb"
IncludeFile "CkXml.pb"

Procedure ChilkatExample()

    email.i = CkEmail::ckCreate()
    If email.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i

    ; 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"
    success = CkEmail::ckLoadEml(email,"someEmail.eml")
    If success <> 1
        Debug CkEmail::ckLastErrorText(email)
        CkEmail::ckDispose(email)
        ProcedureReturn
    EndIf

    ; 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:
    xml.i = CkXml::ckCreate()
    If xml.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; 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.  
    CkXml::setCkTag(xml, "DeliveryStatusFields")
    CkXml::ckNewChild2(xml,"Status","5.1.2 (bad destination system: no such domain)")
    CkXml::ckNewChild2(xml,"Diagnostic-Code","smtp; Permanent failure: no such domain")
    CkXml::ckNewChild2(xml,"X-BounceCategory","bad-domain")

    xmlStr.s = CkXml::ckGetXml(xml)

    ; 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.
    bHeaderOnly.i = 1

    ; 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).
    humanReadableExplanation.s = "Blah blah blah. The delivery of this email failed. Blah blah blah"

    ; OK, we're ready to create DSN....
    dsnEmail.i

    dsnEmail = CkEmail::ckCreateDsn(email,humanReadableExplanation,xmlStr,bHeaderOnly)
    If CkEmail::ckLastMethodSuccess(email) = 0
        Debug CkEmail::ckLastErrorText(email)
        CkEmail::ckDispose(email)
        CkXml::ckDispose(xml)
        ProcedureReturn
    EndIf

    ; Show the MIME of the source (original) email:
    Debug CkEmail::ckGetMime(email)

    Debug "**************************************"

    ; Show the MIME of the DSN email:
    Debug CkEmail::ckGetMime(dsnEmail)

    CkEmail::ckDispose(dsnEmail)

    ; 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--
    ; 
    ; 


    CkEmail::ckDispose(email)
    CkXml::ckDispose(xml)


    ProcedureReturn
EndProcedure