(CkPython) Create DSN (Delivery Status Notification) Email

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

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import sys
import chilkat

email = chilkat.CkEmail()

# 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 = email.LoadEml("someEmail.eml")
if (success != True):
    print(email.lastErrorText())
    sys.exit()

# 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 = chilkat.CkXml()

# 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.  
xml.put_Tag("DeliveryStatusFields")
xml.NewChild2("Status","5.1.2 (bad destination system: no such domain)")
xml.NewChild2("Diagnostic-Code","smtp; Permanent failure: no such domain")
xml.NewChild2("X-BounceCategory","bad-domain")

xmlStr = xml.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.
bHeaderOnly = True

# 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 = "Blah blah blah. The delivery of this email failed. Blah blah blah"

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

# dsnEmail is a CkEmail
dsnEmail = email.CreateDsn(humanReadableExplanation,xmlStr,bHeaderOnly)
if (email.get_LastMethodSuccess() == False):
    print(email.lastErrorText())
    sys.exit()

# Show the MIME of the source (original) email:
print(email.getMime())

print("**************************************")

# Show the MIME of the DSN email:
print(dsnEmail.getMime())

# 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--
# 
#