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
{
  /// 

  /// 邮箱类
  /// 
  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
  }

  /// 

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

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

    /// 

    /// 初始化常用smtpServer，用于绑定下拉选择菜单
    /// 
    private void IniSmtpServer()
    {
      smtpServer = new Dictionary();
      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");      
    }

    /// 

    /// 初始化常用popServer，用于绑定下拉选择菜单
    /// 
    private void IniPopServer()
    {
      popServer = new Dictionary();
      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");
    }

    /// 

    /// 发送邮件功能
    /// 
    /// 登录邮箱
    /// 登录密码
    /// 邮件昵称
    /// 邮件标题
    /// 邮件地址
    /// 邮件内容
    /// smtp服务器
    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;
      }
    }

    /// 

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

    /// 

    /// 利用异步方式检查邮箱账号和密码是否正确
    /// 
    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; }
    }
   

    /// 

    /// 判断用户邮箱账号和密码是否正确
    /// 
    /// PopServer地址
    /// 用户名
    /// 密码
    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+ "rn";
 outbytes = Encoding.ASCII.GetBytes(input.ToCharArray());
 ns.Write(outbytes, 0, outbytes.Length);
 readuser = sr.ReadLine();
 input = "pass " + checkInfo.pwd + "rn";
 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;
      }
    }
    
    /// 

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