public static class EmailHelper
  {
    /// <summary>
    /// 發(fā)送郵件
    /// </summary>
    /// <param name="subject">郵件主題</param>
    /// <param name="msg">郵件內(nèi)容</param>
    /// <param name="filePath">附件地址，如果不添加附件傳null或""</param>
    /// <param name="senderEmail">發(fā)送人郵箱地址</param>
    /// <param name="senderPwd">發(fā)送人郵箱密碼</param>
    /// <param name="recipientEmail">接收人郵箱</param>
    public static void SendMail(string subject, string msg, string filePath, string senderEmail, string senderPwd, params string[] recipientEmail)
    {
      if (!CheckIsNotEmptyOrNull(subject, msg, senderEmail, senderPwd) || recipientEmail == null || recipientEmail.Length == 0)
      {
        throw new Exception("輸入信息無效");
      }
      try
      {
        string[] sendFromUser = senderEmail.Split('@');

        //構(gòu)造一個(gè)Email的Message對象
        MailMessage message = new MailMessage();

        //確定smtp服務(wù)器地址。實(shí)例化一個(gè)Smtp客戶端
        System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient("smtp." + sendFromUser[1]);

        //構(gòu)造發(fā)件人地址對象
        message.From = new MailAddress(senderEmail, sendFromUser[0], Encoding.UTF8);

        //構(gòu)造收件人地址對象
        foreach (string userName in recipientEmail)
        {
          message.To.Add(new MailAddress(userName, userName.Split('@')[0], Encoding.UTF8));
        }

        if (!string.IsNullOrEmpty(filePath))
        {
          Attachment attach = new Attachment(filePath);
          //得到文件的信息
          ContentDisposition disposition = attach.ContentDisposition;
          disposition.CreationDate = System.IO.File.GetCreationTime(filePath);
          disposition.ModificationDate = System.IO.File.GetLastWriteTime(filePath);
          disposition.ReadDate = System.IO.File.GetLastAccessTime(filePath);
          //向郵件添加附件
          message.Attachments.Add(attach);
        }

        //添加郵件主題和內(nèi)容
        message.Subject = subject;
        message.SubjectEncoding = Encoding.UTF8;
        message.Body = msg;
        message.BodyEncoding = Encoding.UTF8;

        //設(shè)置郵件的信息
        client.DeliveryMethod = SmtpDeliveryMethod.Network;
        message.BodyEncoding = System.Text.Encoding.UTF8;
        message.IsBodyHtml = false;

        //如果服務(wù)器支持安全連接，則將安全連接設(shè)為true。
        //gmail,qq支持，163不支持
        switch (sendFromUser[1])
        {
          case "gmail.com":
          case "qq.com":
            client.EnableSsl = true;
            break;
          default:
            client.EnableSsl = false;
            break;
        }

        //設(shè)置用戶名和密碼。
        client.UseDefaultCredentials = false;
        //用戶登陸信息
        NetworkCredential myCredentials = new NetworkCredential(senderEmail, senderPwd);
        client.Credentials = myCredentials;
        //發(fā)送郵件
        client.Send(message);
      }
      catch (Exception ex)
      {
        throw (ex);
      }
    }

    /// <summary>
    /// 驗(yàn)證所有傳入字符串不能為空或null
    /// </summary>
    /// <param name="ps">參數(shù)列表</param>
    /// <returns>都不為空或null返回true，否則返回false</returns>
    public static bool CheckIsNotEmptyOrNull(params string[] ps)
    {
      if (ps != null)
      {
        foreach (string item in ps)
        {
          if (string.IsNullOrEmpty(item)) return false;
        }
        return true;
      }
      return false;
    }
  }