如何使用TCPCLIENT登陆搭到GMAIL邮箱？

Question

如何使用TCPCLIENT登陆搭到GMAIL邮箱？
前面的步骤都可以实现。但是后面的登陆却无法使用！

Answer 1

你打算用什么协议访问？IMAP？POP？HTTP？

Answer 2

GMAIL的是SSL方式的登录，你和TCPClient是否符合要求？

Answer 3

就是想知道如何是TCPCLIENT来登陆gmail目的就想知道很多电子邮件列表中那些邮件对于GMAIL来说是合法的电子邮件。

Answer 4

 /// <summary>
        /// 连接邮件服务器
        /// </summary>
        /// <param name="ServerIP">服务器地址</param>
        /// <param name="Port">服务器端口</param>
        /// <param name="UserName">用户名</param>
        /// <param name="UserPassword">密码</param>
        /// <param name="IsSSL">是否加密</param>
        /// <returns>是否连接成功</returns>
        public bool Connect(string ServerIP, int Port, string UserName, string UserPassword, bool IsSSL)
        {
            try
            {
                MyTcpClient.ReceiveTimeout = 5000;
                MyTcpClient.SendTimeout = 5000;
                MyTcpClient.Connect(ServerIP, Port);
                //MyTcpClient.ReceiveTimeout = 200000;
                //MyTcpClient.SendTimeout = 20000;
                Stream stream;
                if (IsSSL)
                {
                    SslStream sslStream = new SslStream(MyTcpClient.GetStream(), false);
                    try
                    {
                        sslStream.AuthenticateAsClient(ServerIP);
                    }
                    catch
                    {
                    }
                    stream = sslStream;
                }
                else
                {
                    NetworkStream netstream = MyTcpClient.GetStream();
                    stream = netstream;
                }
                stream.ReadTimeout = 60000;
                sreader = new StreamReader(stream, Encoding.Default);
                swriter = new StreamWriter(stream);
                string result = sreader.ReadLine();                //验证用户和密码                swriter.WriteLine("USER " + UserName);
                swriter.Flush();                result = sreader.ReadLine();
                if (result.Substring(0, 3) == "-ER")
                {
                    throw new Exception("用户名错误");//没有该用户名;
                }                swriter.WriteLine("PASS " + UserPassword);
                swriter.Flush();                try
                {
                    result = sreader.ReadLine();
                }
                catch (IOException)
                {
                    throw new Exception("密码错误");//未能读取行
                }                if (result.Substring(0, 3) == "-ER")
                {
                    throw new Exception("密码错误"); //无法登录,可能使用户名密码错误!
                }
                this.Connected = true;//设置连接属性
                return true;            }
            catch (Exception err)
            {
                throw;
            }
        }

Answer 5

接5楼,使用SSL流连接GMail服务器就可以了,上面代码是我写的一个pop类,可以连接Gmail

Answer 6

to ：ufostop
能不能吧整个类发出来我看看！

Answer 7

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net.Security;
using System.Net.Sockets;namespace OpenSSL
{
    class Program
    {
        TcpClient MyTcpClient;
        StreamReader sreader;
        StreamWriter swriter;
        /// <summary>
        /// 连接邮件服务器
        /// </summary>
        /// <param name="ServerIP">服务器地址</param>
        /// <param name="Port">服务器端口</param>
        /// <param name="UserName">用户名</param>
        /// <param name="UserPassword">密码</param>
        /// <param name="IsSSL">是否加密</param>
        /// <returns>是否连接成功</returns>
        public  bool Connect(string ServerIP, int Port, string UserName, string UserPassword, bool IsSSL)
        {
            try
            {
                MyTcpClient.ReceiveTimeout = 5000;
                MyTcpClient.SendTimeout = 5000;
                MyTcpClient.Connect(ServerIP, Port);
                //MyTcpClient.ReceiveTimeout = 200000;
                //MyTcpClient.SendTimeout = 20000;
                Stream stream;
                if (IsSSL)
                {
                    SslStream sslStream = new SslStream(MyTcpClient.GetStream(), false);
                    try
                    {
                        sslStream.AuthenticateAsClient(ServerIP);
                    }
                    catch
                    {
                    }
                    stream = sslStream;
                }
                else
                {
                    NetworkStream netstream = MyTcpClient.GetStream();
                    stream = netstream;
                }
                stream.ReadTimeout = 60000;
                sreader = new StreamReader(stream, Encoding.Default);
                swriter = new StreamWriter(stream);
                string result = sreader.ReadLine();                //验证用户和密码                swriter.WriteLine("USER " + UserName);
                swriter.Flush();                result = sreader.ReadLine();
                if (result.Substring(0, 3) == "-ER")
                {
                    throw new Exception("用户名错误");//没有该用户名;
                }                swriter.WriteLine("PASS " + UserPassword);
                swriter.Flush();                try
                {
                    result = sreader.ReadLine();
                }
                catch (IOException)
                {
                    throw new Exception("密码错误");//未能读取行
                }                if (result.Substring(0, 3) == "-ER")
                {
                    throw new Exception("密码错误"); //无法登录,可能使用户名密码错误!
                }                
                return true;            }
            catch (Exception err)
            {
                throw;
            }
        }        public string OperaStream( string strCmd)
        {
            swriter.WriteLine(strCmd);
            swriter.Flush();
            string result = sreader.ReadLine();
            return result; 
        }        static void Main(string[] args)
        {
            Program p = new Program();
            p.MyTcpClient = new TcpClient();
            if (p.Connect("pop.gmail.com", 995, "[email protected]", "15972572759", true) == true)
            {
                Console.WriteLine("Connect Is OK!");
                string Cmd = Console.ReadLine();
                while (Cmd.ToLower() != "quit")
                {
                    string temp = p.OperaStream( Cmd);
                    Console.WriteLine(temp);
                    Cmd = Console.ReadLine();                }
            }
            
        }
    }
}
这是根据U的帖子修改的。拷贝到VS里面可以直接编译的。共同学习一下！