[转载]C#实现邮件发送的功能

• 发送邮件所用的核心知识点

 

•   微软封装好的MailMessage类：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）
•   微软封装好的SmtpClient类：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）
•   SmtpClient主要进行了三层的封装：Socket --> TcpClient --> SmtpClient

• 具体代码请看如下所示：

  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
      {
          static void 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());
              }
          }
      }
  
      public class 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）
          private int mSenderPort;   //发送邮件所用的端口号（htmp协议默认为25）
          private string mSenderServerHost;    //发件箱的邮件服务器地址（IP形式或字符串形式均可）
          private string mSenderPassword;    //发件箱的密码
          private string 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）
          private bool mEnableSsl;    //是否对邮件内容进行socket层加密传输
          private bool 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>
          public void 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>
          public void 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());
              }
          }
      }
  }