Dart

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

See more SMTP Examples

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. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // 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>

  final 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>';

  final email = CkEmail();

  // Add subject, TO, FROM, etc.
  email.subject = '[v=EMCS.NL][a=NL****][k=****][s=0]';
  email.from = 'joe@example1.com';
  email.addTo('Mary', 'mary@example2.com');

  email.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
  final mailman = CkMailMan();

  mailman.smtpHost = 'smtp.my_mail_server.com';
  mailman.smtpUsername = 'myUsername';
  mailman.smtpPassword = 'myPassword';
  mailman.smtpPort = 465;
  mailman.smtpSsl = true;
  mailman.startTLS = true;

  try {
    mailman.sendEmail(email);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  try {
    mailman.closeSmtpConnection();
  } on ChilkatException {
    print('Connection to SMTP server not closed cleanly.');
  }

  print('Mail Sent!');
}