(Visual FoxPro) 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

LOCAL loEmail
LOCAL lnSuccess
LOCAL loXml
LOCAL lcXmlStr
LOCAL lnBHeaderOnly
LOCAL lcHumanReadableExplanation
LOCAL loDsnEmail

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Email')
loEmail = CreateObject('Chilkat.Email')

* 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"
lnSuccess = loEmail.LoadEml("someEmail.eml")
IF (lnSuccess <> 1) THEN
    ? loEmail.LastErrorText
    RELEASE loEmail
    CANCEL
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:
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Xml')
loXml = CreateObject('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 -- it's simply for the example.  
loXml.Tag = "DeliveryStatusFields"
loXml.NewChild2("Status","5.1.2 (bad destination system: no such domain)")
loXml.NewChild2("Diagnostic-Code","smtp; Permanent failure: no such domain")
loXml.NewChild2("X-BounceCategory","bad-domain")

lcXmlStr = loXml.GetXml()

* 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.
lnBHeaderOnly = 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).
lcHumanReadableExplanation = "Blah blah blah. The delivery of this email failed. Blah blah blah"

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

loDsnEmail = loEmail.CreateDsn(lcHumanReadableExplanation,lcXmlStr,lnBHeaderOnly)
IF (loEmail.LastMethodSuccess = 0) THEN
    ? loEmail.LastErrorText
    RELEASE loEmail
    RELEASE loXml
    CANCEL
ENDIF

* Show the MIME of the source (original) email:
? loEmail.GetMime()

? "**************************************"

* Show the MIME of the DSN email:
? loDsnEmail.GetMime()

RELEASE loDsnEmail

* 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--
* 
* 

RELEASE loEmail
RELEASE loXml