using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Mail;
using System.Net.Mime;
using System.IO;
using System.Timers;
using System.Xml;

namespace MyEmailTest
{
class Program
    {
staticvoid Main(string[] args)
        {
try
            {
//smtp.163.com
string senderServerIp = "123.125.50.133";
//smtp.gmail.com
//string senderServerIp = "74.125.127.109";
//smtp.qq.com
//string senderServerIp = "58.251.149.147";
//string senderServerIp = "smtp.sina.com";
string toMailAddress = "mingmingruyuedlut@163.com";
string fromMailAddress = "mingmingruyuedlut@163.com";
string subjectInfo = "Test sending e_mail";
string bodyInfo = "Hello Eric, This is my first testing e_mail";
string mailUsername = "mingmingruyuedlut"; 
string mailPassword = ".........."; //发送邮箱的密码（）
string mailPort = "25";
string attachPath = "E:\\123123.txt; E:\\haha.pdf";

                MyEmail email = new MyEmail(senderServerIp, toMailAddress, fromMailAddress, subjectInfo, bodyInfo, mailUsername, mailPassword, mailPort, false, false);
                email.AddAttachments(attachPath);
                email.Send();
            }
catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }
    }

publicclass MyEmail
    {
private MailMessage mMailMessage;   //主要处理发送邮件的内容（如：收发人地址、标题、主体、图片等等）
private SmtpClient mSmtpClient; //主要处理用smtp方式发送此邮件的配置信息（如：邮件服务器、发送端口号、验证方式等等）
privateint mSenderPort;   //发送邮件所用的端口号（htmp协议默认为25）
privatestring mSenderServerHost;    //发件箱的邮件服务器地址（IP形式或字符串形式均可）
privatestring mSenderPassword;    //发件箱的密码
privatestring mSenderUsername;   //发件箱的用户名（即@符号前面的字符串，例如：hello@163.com，用户名为：hello）
privatebool mEnableSsl;    //是否对邮件内容进行socket层加密传输
privatebool mEnablePwdAuthentication;  //是否对发件人邮箱进行密码验证

///<summary>
/// 构造函数
///</summary>
///<param name="server">发件箱的邮件服务器地址</param>
///<param name="toMail">收件人地址（可以是多个收件人，程序中是以“;"进行区分的）</param>
///<param name="fromMail">发件人地址</param>
///<param name="subject">邮件标题</param>
///<param name="emailBody">邮件内容（可以以html格式进行设计）</param>
///<param name="username">发件箱的用户名（即@符号前面的字符串，例如：hello@163.com，用户名为：hello）</param>
///<param name="password">发件人邮箱密码</param>
///<param name="port">发送邮件所用的端口号（htmp协议默认为25）</param>
///<param name="sslEnable">true表示对邮件内容进行socket层加密传输，false表示不加密</param>
///<param name="pwdCheckEnable">true表示对发件人邮箱进行密码验证，false表示不对发件人邮箱进行密码验证</param>
public MyEmail(string server, string toMail, string fromMail, string subject, string emailBody, string username, string password, string port, bool sslEnable, bool pwdCheckEnable)
        {
try
            {
                mMailMessage = new MailMessage();
                mMailMessage.To.Add(toMail);
                mMailMessage.From = new MailAddress(fromMail);
                mMailMessage.Subject = subject;
                mMailMessage.Body = emailBody;
                mMailMessage.IsBodyHtml = true;
                mMailMessage.BodyEncoding = System.Text.Encoding.UTF8;
                mMailMessage.Priority = MailPriority.Normal;
this.mSenderServerHost = server;
this.mSenderUsername = username;
this.mSenderPassword = password;
this.mSenderPort = Convert.ToInt32(port);
this.mEnableSsl = sslEnable;
this.mEnablePwdAuthentication = pwdCheckEnable;
            }
catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }

///<summary>
/// 添加附件
///</summary>
///<param name="attachmentsPath">附件的路径集合，以分号分隔</param>
publicvoid AddAttachments(string attachmentsPath)
        {
try
            {
string[] path = attachmentsPath.Split(‘;‘); //以什么符号分隔可以自定义
                Attachment data;
                ContentDisposition disposition;
for (int i = 0; i < path.Length; i++)
                {
                    data = new Attachment(path[i], MediaTypeNames.Application.Octet);
                    disposition = data.ContentDisposition;
                    disposition.CreationDate = File.GetCreationTime(path[i]);
                    disposition.ModificationDate = File.GetLastWriteTime(path[i]);
                    disposition.ReadDate = File.GetLastAccessTime(path[i]);
                    mMailMessage.Attachments.Add(data);
                }
            }
catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }

///<summary>
/// 邮件的发送
///</summary>
publicvoid Send()
        {
try
            {
if (mMailMessage != null)
                {
                    mSmtpClient = new SmtpClient();
//mSmtpClient.Host = "smtp." + mMailMessage.From.Host;
                    mSmtpClient.Host = this.mSenderServerHost;
                    mSmtpClient.Port = this.mSenderPort;
                    mSmtpClient.UseDefaultCredentials = false;
                    mSmtpClient.EnableSsl = this.mEnableSsl;
if (this.mEnablePwdAuthentication)
                    {
                        System.Net.NetworkCredential nc = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
//mSmtpClient.Credentials = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
//NTLM: Secure Password Authentication in Microsoft Outlook Express
                        mSmtpClient.Credentials = nc.GetCredential(mSmtpClient.Host, mSmtpClient.Port, "NTLM");
                    }
else
                    {
                        mSmtpClient.Credentials = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
                    }
                    mSmtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
                    mSmtpClient.Send(mMailMessage);
                }
            }
catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }
    }
}