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Denis
Asked:2020-03-20 22:52:14 +0000 UTC2020-03-20 22:52:14 +0000 UTC

-ERR POP3 仅在启用 SSL 或 TLS 连接时可用

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告诉我谁知道。几天来，我一直在努力尝试连接到端口 110 上的 pop.mail.ru 服务器。发送 USER 时，我从服务器收到错误消息：

-ERR POP3 is available only with SSL or TLS connection enabled

网上所有的例子都没有设计成使用SSL或者TLS加密，怎么和这个加密联系起来呢？有文章吗？感谢你的回答。

编码：

mailclient = new TcpClient("pop.mail.ru", 110);
NetworkStream ns = mailclient.GetStream();
StreamReader sr = new StreamReader(ns);
StreamWriter sw = new StreamWriter(ns);

sw.WriteLine("USER " + "***@mail.ru");
sw.Flush();
c#

1 个回答

  1. Best Answer

    必须与一起使用SslStream，TcpClient然后用于SslStream读取数据，而不是TcpClient.

    就像是：

        TcpClient mail = new TcpClient();
    SslStream sslStream;
    int bytes = -1;

    mail.Connect("pop.mail.ru", 995);
    sslStream = new SslStream(mail.GetStream());

    sslStream.AuthenticateAsClient("pop.mail.ru");

    byte[] buffer = new byte[2048];
    // Чтение потока, чтобы убедиться, что мы подключены
    bytes = sslStream.Read(buffer, 0, buffer.Length);
    Console.WriteLine(Encoding.ASCII.GetString(buffer, 0, bytes));

    //Отправить имя пользователя для входа в систему
    sslStream.Write(Encoding.ASCII.GetBytes("USER USER_EMAIL\r\n"));
    bytes = sslStream.Read(buffer, 0, buffer.Length);
    Console.WriteLine(Encoding.ASCII.GetString(buffer, 0, bytes));

    //Отправить пароль для входа в систему                       
    sslStream.Write(Encoding.ASCII.GetBytes("PASS USER_PASSWORD\r\n"));
    bytes = sslStream.Read(buffer, 0, buffer.Length);
    Console.WriteLine(Encoding.ASCII.GetString(buffer, 0, bytes));

    //Получить первое письмо 
    sslStream.Write(Encoding.ASCII.GetBytes("RETR 1\r\n"));
    bytes = sslStream.Read(buffer, 0, buffer.Length);
    Console.WriteLine(Encoding.ASCII.GetString(buffer, 0, bytes));

    取自这里

    • 1

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