Dart

SMTP using HTTP Proxy

Demonstrates how to communicate with an SMTP server via an HTTP proxy. 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();

  // To connect through an HTTP proxy, set the HttpProxyHostname
  // and HttpProxyPort properties to the hostname (or IP address)
  // and port of the HTTP proxy.  Typical port numbers used by
  // HTTP proxy servers are 3128 and 8080.
  mailman.httpProxyHostname = 'www.my-http-proxy.com';
  mailman.httpProxyPort = 3128;

  // Important:  Your HTTP proxy server must allow non-HTTP
  // traffic to pass.  Otherwise this does not work.

  // Set the SMTP server.
  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');

  // Call SendEmail to connect to the SMTP server via the HTTP proxy 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;
  }

  // Some SMTP servers do not actually send the email until 
  // the connection is closed.  In these cases, it is necessary to
  // call CloseSmtpConnection for the mail to be  sent.  
  // Most SMTP servers send the email immediately, and it is 
  // not required to close the connection.  We'll close it here
  // for the example:
  try {
    mailman.closeSmtpConnection();
  } on ChilkatException {
    print('Connection to SMTP server not closed cleanly.');
  }

  print('Mail Sent!');
}