(CkPython) Create Non-Multipart Email with XML Body that is an Attachment

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Creates an email where the only body is a binary WAV file. The technique used in the example could be applied to other binary files, such as PDF, MS-WORD docs, Excel docs, etc.

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

import sys
import chilkat

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# The goal of this example is to create an email that has this MIME format,
# where the body of the email is XML using base64 encoding, 
# and the Content-Type and Content-Disposition are set as indicated.

# Date: Wed, 23 Aug 2023 09:01:52 +0200 (CEST)
# From: joe@example1.com
# Subject: [v=EMCS.NL][a=NL****][k=****][s=0]
# To: mary@example2.com
# MIME-Version: 1.0
# Content-Type: application/octet-stream; charset=us-ascii; name=6bd8dfe259b3a42c90a28a82b5fc6e77.txt
# Content-Transfer-Encoding: Base64
# Content-Disposition: attachment; filename=6bd8dfe259b3a42c90a28a82b5fc6e77.txt
# Message-Id: <......>
# 
# <multi-line base64 encoded XML here>

success = True

xmlBody = "<ie:IE801 xmlns:ie=\"urn:publicid:-:EC:DGTAXUD:EMCS:PHASE4:IE801:V3.01\" xmlns:tms=\"urn:publicid:-:EC:DGTAXUD:EMCS:PHASE4:TMS:V3.01\">....</ie:IE801>"

email = chilkat.CkEmail()

# Add subject, TO, FROM, etc.
email.put_Subject("[v=EMCS.NL][a=NL****][k=****][s=0]")
email.put_From("joe@example1.com")
success = email.AddTo("Mary","mary@example2.com")

email.put_Body(xmlBody)

email.AddHeaderField("Content-Transfer-Encoding","Base64")
email.AddHeaderField("Content-Type","application/octet-stream; charset=us-ascii; name=6bd8dfe259b3a42c90a28a82b5fc6e77.txt")
email.AddHeaderField("Content-Disposition","attachment; filename=6bd8dfe259b3a42c90a28a82b5fc6e77.txt")

# Your email is ready to send
mailman = chilkat.CkMailMan()

mailman.put_SmtpHost("smtp.my_mail_server.com")
mailman.put_SmtpUsername("myUsername")
mailman.put_SmtpPassword("myPassword")
mailman.put_SmtpPort(465)
mailman.put_SmtpSsl(True)
mailman.put_StartTLS(True)

success = mailman.SendEmail(email)
if (success != True):
    print(mailman.lastErrorText())
    sys.exit()

success = mailman.CloseSmtpConnection()
if (success != True):
    print("Connection to SMTP server not closed cleanly.")

print("Mail Sent!")