(Chilkat2-Python) Create DSN (Delivery Status Notification) Email

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

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

email = chilkat2.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"
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 = chilkat2.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.  
xml.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.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--
# 
#