问异常:不支持的操作: Platform._localHostname

EN

...
import 'package:mailer2/mailer.dart';
...
class HomeComponent(){
void onSubmit(Map<String, dynamic> contactUsInfo) {


    //Gmail account used to send email
      var options = new GmailSmtpOptions()
    ..username = 'my-gmail-account'
    ..password = 'my-gmail-password';




    // Create our email transport.
    var emailTransport = new SmtpTransport(options);

  // Create our mail/envelope.
  var envelope = new Envelope()
    ..from = 'sender-email-here'
    ..recipients.add('recievers-mail-here')
    //..bccRecipients.add('hidden@recipient.com')
    ..subject = 'Testing the Dart Mailer library'
    //..attachments.add(new Attachment(file: new File('path/to/file')))
    ..text = 'This is a cool email message. Whats up?'
    ..html = '<h1>Test</h1><p>Hey!</p>';

// Email it.
  emailTransport.send(envelope)
    .then((envelope) => print('Email sent!'))
    .catchError((e) => print('Error occurred: $e'));



  }
}