Dart

Send High Priority Email (SMTP, X-Priority header)

Demonstrates how to send high-priorty email (or lower priority email) by setting the X-Priority header field. 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 mailman object is used for sending and receiving email.
  final mailman = CkMailMan();

  // Set the SMTP server (obviously, use your SMTP server, not chilkatsoft.com)
  mailman.smtpHost = 'smtp.chilkatsoft.com';

  // Set the SMTP login/password (if required)
  mailman.smtpUsername = 'myUsername';
  mailman.smtpPassword = 'myPassword';

  // Create a new email object
  final email = CkEmail();

  email.subject = 'This is a test';
  email.body = 'This is a test';
  email.from = 'Chilkat Support <support@chilkatsoft.com>';
  email.addTo('Chilkat Admin', 'admin@chilkatsoft.com');
  // To add more recipients, call AddTo, AddCC, or AddBcc once per recipient.

  // To send high-priority email, 
  // add the X-Priority header field with the value "1" 
  // to indicate highest-priority.
  // A value of "3" is normal, which is the same as not setting
  // the X-Priority header at all, and "5" is the lowest. 
  // "2" and "4" are in-betweens.

  // Microsoft Outlook might add the following headers when
  // sending high-priority email.

  // X-Priority: 1 (Highest) 
  // X-MSMail-Priority: High 
  // Importance: High 

  // The X-Priority header alone is enough to make the email high-priority.

  email.addHeaderField('X-Priority', '1');

  // Call SendEmail to connect to the SMTP server and send.
  // The connection (i.e. session) to the SMTP server remains
  // open so that subsequent SendEmail calls may use the
  // same connection.  
  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!');
}