阅读只有TcpClient的POP3服务器和StreamWriter / StreamReader的 [英] Reading a POP3 server with only TcpClient and StreamWriter/StreamReader

问题描述

我尝试通过POP3协议从我的live.com帐户中读取邮件。

I'm trying to read mails from my live.com account, via the POP3 protocol.

我发现服务器是pop3.live.com和端口（如果是995）。

I've found the the server is pop3.live.com and the port if 995.

我不打算使用预制库，我使用NetworkStream和StreamReader / StreamWriter作业。我需要弄清楚这一点。因此，此处提供的任何答案： http://stackoverflow.com/questions/44383 / reading-email-using-pop3-in-c 不是有用的。

I'm not planning on using a pre-made library, I'm using NetworkStream and StreamReader/StreamWriter for the job. I need to figure this out. So, any of the answers given here: http://stackoverflow.com/questions/44383/reading-email-using-pop3-in-c are not usefull.

它是一个更大的程序的一部分，但我做了一个小测试如果它工作。无论如何，我没有得到任何东西。这是我使用的代码，我认为应该是正确的。

It's part of a larger program, but I made a small test to see if it works. Eitherway, i'm not getting anything. Here's the code I'm using, which I think should be correct.

编辑：这段代码是旧的，请参考第二个块问题解决。

this code is old, please refer to the second block problem solved.

public Program() {
    string temp = "";
    using(TcpClient tc = new TcpClient(new IPEndPoint(IPAddress.Parse("127.0.0.1"),8000))) {
        tc.Connect("pop3.live.com",995);
        using(NetworkStream nws = tc.GetStream()) {
            using(StreamReader sr = new StreamReader(nws)) {
                using(StreamWriter sw = new StreamWriter(nws)) {
                    sw.WriteLine("USER " + user);
                    sw.Flush();
                    sw.WriteLine("PASS " + pass);
                    sw.Flush();
                    sw.WriteLine("LIST");
                    sw.Flush();
                    while(temp != ".") {
                        temp += sr.ReadLine();
                    }
                }
            }
        }
    }
    Console.WriteLine(temp);
}

Visual Studio调试器不断地落在 tc.Connect pop3.live.com，995）; 其中抛出一个套接字操作尝试到一个不可达网络65.55.172.253:995错误。

Visual Studio debugger constantly falls over tc.Connect("pop3.live.com",995); Which throws an "A socket operation was attempted to an unreachable network 65.55.172.253:995" error.

所以，我从我的机器上的端口8000发送到端口995，hotmail pop3端口。
我没有什么，我没有想法。

So, I'm sending from port 8000 on my machine to port 995, the hotmail pop3 port. And I'm getting nothing, and I'm out of ideas.

第二块：显然我没有写退出命令。

Second block: Problem was apparently that I didn't write the quit command.

代码：

public Program() {
    string str = string.Empty;
    string strTemp = string.Empty;
    using(TcpClient tc = new TcpClient()) {
        tc.Connect("pop3.live.com",995);
        using(SslStream sl = new SslStream(tc.GetStream())) {
            sl.AuthenticateAsClient("pop3.live.com"); 
            using(StreamReader sr = new StreamReader(sl)) {
                using(StreamWriter sw = new StreamWriter(sl)) {
                    sw.WriteLine("USER " + user);
                    sw.Flush();
                    sw.WriteLine("PASS " + pass);
                    sw.Flush();
                    sw.WriteLine("LIST");
                    sw.Flush();
                    sw.WriteLine("QUIT ");
                    sw.Flush();

                    while((strTemp = sr.ReadLine()) != null) {
                        if(strTemp == "." || strTemp.IndexOf("-ERR") != -1) {
                            break;
                        }
                        str += strTemp;
                    }
                }
            }
        }
    }
    Console.WriteLine(str);
}

推荐答案

网络流量使用Wireshark？是否正在发送任何邮件？

What happens if you view the Network Traffic using Wireshark? Is it sending anything at all?

编辑：我无法通过telnet连接到该端口的pop3.live.com。您是否通过pop3电子邮件客户端成功连接？

I can't connect via telnet to pop3.live.com at that port either. Have you managed to successfully connect via a pop3 email client ever?

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