MailSmtp ms = new MailSmtp("smtp.qq.com","1215247044","xxxx");     //可選參數     ms.SetCC("610262374@qq.com");//抄送可以多個     ms.SetBC("610262374@qq.com");//暗送可以多個     ms.SetIsHtml(true);//默認:true     ms.SetEncoding(System.Text.Encoding.UTF8);//設置格式 默認utf-8     ms.SetIsSSL(true);//是否ssl加密 默認為false     //調用函數     bool isSuccess = ms.Send("1215247044@qq.com", "test", "610262374@qq.com", "哈哈", "哈哈", Server.MapPath("~/Test.dll"));     //輸出結果     Response.Write(ms.Result); 　　

using System;using System.IO;using System.Web.UI.WebControls;using System.Text;using System.Net.Mail;using System.Net;using System.Linq;using System.Text.RegularExpressions;namespace SyntacticSugar{  /// <summary>  /// ** 描述：郵件發送  /// ** 創始時間：2015-6-8  /// ** 修改時間：-  /// ** 作者：sunkaixuan  /// </summary>  public class MailSmtp  {    /// <summary>    /// 設置郵件編碼類型    /// </summary>    /// <param name="contentEncoding"></param>    public void SetEncoding(Encoding contentEncoding)    {      this._encoding = contentEncoding;    }    /// <summary>    ///設置郵件正文是否為 Html 格式     /// </summary>    /// <param name="isHtml"></param>    public void SetIsHtml(bool isHtml)    {      this._isHtml = isHtml;    }    /// <summary>    /// 抄送    /// </summary>    /// <param name="cc"></param>    public void SetCC(params string[] cc)    {      this._cc = cc;    }    /// <summary>    /// 暗送    /// </summary>    /// <param name="cc"></param>    public void SetBC(params string[] bc)    {      this._bcc = bc;    }    /// <summary>    /// 是否ssl加密    /// </summary>    /// <param name="isSSL"></param>    public void SetIsSSL(bool isSSL)    {      this._smtp.EnableSsl = isSSL;    }    /// <summary>    /// 構造函數    /// </summary>    /// <param name="host"></param>    /// <param name="username">郵件賬號</param>    /// <param name="password">密碼</param>    public MailSmtp(string host, string username, string password)    {      this._smtp.Host = host;      this._smtp.Port = 0x19;      this._smtp.EnableSsl = false;      this._isHtml = true;      this._encoding = Encoding.UTF8;      if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password))      {        this._smtp.UseDefaultCredentials = false;      }      else      {        this._smtp.Credentials = new NetworkCredential(username, password);      }    }    /// <summary>    /// 發送郵件    /// </summary>    /// <param name="from">發件人郵件地址</param>    /// <param name="sender">發件人顯示名稱</param>    /// <param name="to">收件人地址</param>    /// <param name="subject">郵件標題</param>    /// <param name="body">郵件正文</param>    /// <param name="file">附件地址數組</param>    /// <returns>bool 是否成功 </returns>    public bool Send(string from, string sender, string to, string subject, string body, params string[] file)    {      return Send(from, sender, new string[] { to }, subject, body, file);    }    /// <summary>    /// 發送郵件    /// </summary>    /// <param name="from">發件人郵件地址</param>    /// <param name="sender">發件人顯示名稱</param>    /// <param name="to">收件人地址</param>    /// <param name="subject">郵件標題</param>    /// <param name="body">郵件正文</param>    /// <param name="file">附件地址數組</param>    /// <returns>bool 是否成功 </returns>    public bool Send(string from, string sender, string[] to, string subject, string body, params string[] file)    {      string mailReg = @"^[/w-]+(/.[/w-]+)*@[/w-]+(/.[/w-]+)+$";      if (to == null)      {        throw new ArgumentNullException("MailSmtp.Send.to");      }      if (to.Any(oit => !Regex.IsMatch(oit + "", mailReg)))      {        this.Result = "收件人地址不合法";        return false;      }      if (_bcc != null && _bcc.Length > 0)      {        if (_bcc.Any(oit => !Regex.IsMatch(oit + "", mailReg)))        {          this.Result = "暗送人地址不合法";          return false;        }      }      if (_cc != null && _cc.Length > 0)      {        if (_cc.Any(oit => !Regex.IsMatch(oit + "", mailReg)))        {          this.Result = "抄送人地址不合法";          return false;        }      }      MailMessage message = new MailMessage();      // 創建一個附件對象      foreach (var r in file)      {        Attachment objMailAttachment;        objMailAttachment = new Attachment(r);//發送郵件的附件        message.Attachments.Add(objMailAttachment);      }      message.From = new MailAddress(from, sender);      message.Subject = subject;      message.SubjectEncoding = this._encoding;      message.Body = body;      message.BodyEncoding = this._encoding;      message.IsBodyHtml = this._isHtml;      message.Priority = MailPriority.Normal;      foreach (string str in to)      {        message.To.Add(str);      }      if (this._bcc != null && this._bcc.Length > 0)      {        foreach (string b in this._bcc)        {          message.Bcc.Add(b);        }      }      if (this._cc != null && this._cc.Length > 0)      {        foreach (string c in this._cc)        {          message.CC.Add(c);        }      }      try      {        this._smtp.Send(message);        return true;      }      catch (Exception ex)      {        Console.WriteLine(ex.Message);      }      return false;    }    private SmtpClient _smtp = new SmtpClient();    private Encoding _encoding { get; set; }    private bool _isHtml { get; set; }    private string[] _cc { get; set; }    private string[] _bcc { get; set; }    /// <summary>    /// 獲取發送結果，成功則為空    /// </summary>    public string Result { get; private set; }  } }