Flutter Mailer发送重复的电子邮件,两个同时

问题描述

我必须构建一个具有发送电子邮件功能的应用程序,所以我决定使用mailer。但是在测试之后,我收到了两封相同的电子邮件,然后又向cc发送了一封电子邮件,并且该电子邮件也收到了两封电子邮件。有没有办法让我的应用程序仅发送一封电子邮件,而不发送两封电子邮件

void _mailer() async {

String username = '**@gmail.com';

String password = '**';

final smtpServer = gmail(username,password);

final message = Message()

  ..from = Address(username,'Your name')
  ..recipients.add('**@outlook.com')
  ..ccRecipients.add('**@yahoo.com')
  ..subject = 'Test Dart Mailer library :: ? :: ${DateTime.Now()}'
  ..text = 'This is the plain text.\nThis is line 2 of the text part.'
  ..attachments = attachments;

try {
  final sendReport = await send(message,smtpServer);
  print('Message sent: ' + sendReport.toString());
} on MailerException catch (e) {
  print('Message not sent.');
  for (var p in e.problems) {
    print('Problem: ${p.code}: ${p.msg}');
  }
}

var connection = PersistentConnection(smtpServer);

await connection.send(message);

await connection.close();
}

解决方法

此功能似乎发送了1封电子邮件:

try {
 final sendReport = await send(message,smtpServer);
  print('Message sent: ' + sendReport.toString());
} on MailerException catch (e) {
  print('Message not sent.');
  for (var p in e.problems) {
    print('Problem: ${p.code}: ${p.msg}');
  }
}

这三行代码正在发送第二封电子邮件:

var connection = PersistentConnection(smtpServer);

await connection.send(message);

await connection.close();

所以我刚刚删除了最后三行代码,现在我的应用仅发送一封电子邮件