C#通用邮件发送类分享

此类的功能包括发送邮件，邮箱格式是否正确，和在不发送邮件的情况下判断邮箱用户名和密码是否正确，鉴于POP检查邮箱用户名和密码出现错误情况返回结果的延迟，用异步线程解决此问题，见代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Mail;
using System.Web;
using System.Net;
using System.Text.RegularExpressions;
using System.Net.Sockets;
using System.IO;
using System.Collections;
using System.Threading;

namespace Com.Web
{
 /// <summary>
 /// 邮箱类
 /// </summary>
 public class CheckEmailInfo
 {
   public string server { get; set; }//服务器
   public string user { get; set; }//用户名
   public string pwd { get; set; }//密码
 }

/// <summary>
 /// SendEmail通用类，通过smtp服务器发送邮件
 /// </summary>
 public class SendEmail
 {
   public Dictionary<string, string> smtpServer;
   public Dictionary<string, string> popServer;

public SendEmail()
   {    
     IniSmtpServer();
     IniPopServer();
   }

/// <summary>
   /// 初始化常用smtpServer，用于绑定下拉选择菜单
   /// </summary>
   private void IniSmtpServer()
   {
     smtpServer = new Dictionary<string, string>();
     smtpServer.Add("网易163邮箱", "smtp.163.com");
     smtpServer.Add("网易vip.163邮箱", "smtp.vip.163.com");
     smtpServer.Add("网易126邮箱", "smtp.126.com");
     smtpServer.Add("网易188邮箱", "smtp.188.com");
     smtpServer.Add("新浪邮箱", "smtp.sina.com");
     smtpServer.Add("雅虎邮箱", "smtp.mail.yahoo.com");
     smtpServer.Add("搜狐邮箱", "smtp.sohu.com");
     smtpServer.Add("TOM邮箱", "smtp.tom.com");
     smtpServer.Add("Gmail邮箱", "smtp.gmail.com");
     smtpServer.Add("QQ邮箱", "smtp.qq.com");
     smtpServer.Add("QQ企业邮箱", "smtp.biz.mail.qq.com");
     smtpServer.Add("139邮箱", "smtp.139.com");
     smtpServer.Add("263邮箱", "smtp.263.com");      
   }

/// <summary>
   /// 初始化常用popServer，用于绑定下拉选择菜单
   /// </summary>
   private void IniPopServer()
   {
     popServer = new Dictionary<string, string>();
     popServer.Add("网易163邮箱", "pop3.163.com");
     popServer.Add("网易vip.163邮箱", "pop3.vip.163.com");
     popServer.Add("网易126邮箱", "pop3.126.com");
     popServer.Add("网易188邮箱", "pop3.188.com");
     popServer.Add("新浪邮箱", "pop3.sina.com");
     popServer.Add("雅虎邮箱", "pop3.mail.yahoo.com");
     popServer.Add("搜狐邮箱", "pop3.sohu.com");
     popServer.Add("TOM邮箱", "pop.tom.com");
     popServer.Add("Gmail邮箱", "pop.gmail.com");
     popServer.Add("QQ邮箱", "pop.qq.com");
     popServer.Add("QQ企业邮箱", "pop.biz.mail.qq.com");
     popServer.Add("139邮箱", "pop.139.com");
     popServer.Add("263邮箱", "pop.263.com");
   }

/// <summary>
   /// 发送邮件功能
   /// </summary>
   /// <param name="fromEmail">登录邮箱</param>
   /// <param name="password">登录密码</param>
   /// <param name="user">邮件昵称</param>
   /// <param name="title">邮件标题</param>
   /// <param name="toEmail">邮件地址</param>
   /// <param name="email">邮件内容</param>
   /// <param name="smtpServer">smtp服务器</param>
   public bool SendMessage(string fromEmail,string password, string user, string title, string toEmail, string email,string smtpServer)
   {
     try
     {      
       SmtpClient smtp = new SmtpClient(); //实例化一个SmtpClient
       smtp.DeliveryMethod = SmtpDeliveryMethod.Network; //将smtp的出站方式设为 Network
       smtp.EnableSsl = false;//smtp服务器是否启用SSL加密
       smtp.Host = smtpServer;//指定 smtp 服务器          
       smtp.Credentials = new NetworkCredential(fromEmail, password);
       MailMessage mm = new MailMessage(); //实例化一个邮件类
       mm.Priority = MailPriority.High; //邮件的优先级，分为 Low, Normal, High，通常用 Normal即可      
       mm.From = new MailAddress(fromEmail, user, Encoding.GetEncoding(936));
       mm.CC.Add(new MailAddress(toEmail, "", Encoding.GetEncoding(936)));
       mm.Subject = title; //邮件标题
       mm.SubjectEncoding = Encoding.GetEncoding(936);
       mm.IsBodyHtml = true; //邮件正文是否是HTML格式mm.BodyEncoding = Encoding.GetEncoding(936);
       mm.Body = email;
       smtp.Send(mm);
       return true;    
     }
     catch
     {
       return false;
     }
   }

/// <summary>
   /// 检查邮箱是否正确的委托
   /// </summary>
   delegate bool MyDelegate(object checkEmailInfo);

/// <summary>
   /// 利用异步方式检查邮箱账号和密码是否正确
   /// </summary>
   public bool CheckUser(string server, string user, string pwd)
   {      
     MyDelegate myDelegate = new MyDelegate(CheckUser);
     CheckEmailInfo checkEmailInfo = new CheckEmailInfo();
     checkEmailInfo.server = server;
     checkEmailInfo.user = user;
     checkEmailInfo.pwd = pwd;
     IAsyncResult result = myDelegate.BeginInvoke(checkEmailInfo, null, null);
     Thread.Sleep(1000);//主线程1秒后检查异步线程是否运行完毕
     if (result.IsCompleted)
     { return myDelegate.EndInvoke(result); }//如果错误的邮箱和密码，函数将会运行很慢
     else
     { return false; }
   }

/// <summary>
   /// 判断用户邮箱账号和密码是否正确
   /// </summary>
   /// <param name="server">PopServer地址</param>
   /// <param name="user">用户名</param>
   /// <param name="pwd">密码</param>
   private bool CheckUser(object checkEmailInfo)
   {    
     CheckEmailInfo checkInfo = (CheckEmailInfo)checkEmailInfo;
     TcpClient sender = new TcpClient(checkInfo.server, 110);//pop协议使用TCP的110端口
     Byte[] outbytes;
     NetworkStream ns;
     StreamReader sr;
     string input;
     string readuser = string.Empty;
     string readpwd = string.Empty;
     try
     {
       ns = sender.GetStream();
       sr = new StreamReader(ns);
       sr.ReadLine();
       //检查用户名和密码
       input = "user " + checkInfo.user+ "\r\n";
       outbytes = Encoding.ASCII.GetBytes(input.ToCharArray());
       ns.Write(outbytes, 0, outbytes.Length);      
       readuser = sr.ReadLine();
       input = "pass " + checkInfo.pwd + "\r\n";
       outbytes =Encoding.ASCII.GetBytes(input.ToCharArray());
       ns.Write(outbytes, 0, outbytes.Length);      
       readpwd = sr.ReadLine();              
       if (readuser.Substring(0, 3) == "+OK" && readpwd.Substring(0, 3) == "+OK")
       { return true; }
       else
       { return false; }
     }
     catch
     {
       return false;
     }
   }

/// <summary>
   /// 判断邮箱格式是否正确
   /// </summary>
   /// <param name="email">邮箱地址</param>
   public bool IsEmail(string email)
   {
     string paterner = @"\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*";
     if (!Regex.IsMatch(email, paterner))
     { return false;}
     else
     {return true;}    
   }
 }
}