C#发送邮件

 static string strEmailFrom = ConfigurationManager.AppSettings["SendFromEMailAddress"];
      static string strEmailPass = ConfigurationManager.AppSettings["SendFromEMailPass"];
      static string strEmailSmtp = ConfigurationManager.AppSettings["SendFromEMailSmtp"];
      /// <summary>
      /// 发送邮件.net2005
      /// </summary>
      /// <param name="strEMailTo">发送邮件的目标邮箱地址，必须是“[url=mailto:XXX@XX.XX]XXX@XX.XX[/url]”格式,如“[url=mailto:to@mail.com]to@mail.com[/url]”</param>
      /// <param name="strSendMailBox">发送邮件使用的邮箱地址，从配置文件中获取</param>
      /// <param name="strSendMailPassword">发送邮件使用的邮箱地址的密码，从配置文件中获取</param>
      /// <param name="strMailTitle">邮件标题</param>
      /// <param name="strMailContent">邮件正文</param>
      /// <param name="strSmtpServerName">使用配置文件中的AppSettings["SendFromEMailSmtp"]做为smtp地址</param>
      /// <param name="mailEncoding">邮件使用的编码，如果设为null或空，将使用UTF8做为编码</param>
      /// <returns>true：邮件发送成功，false：邮件发送失败</returns>  
        public static bool SendEMail(string strEMailTo, string strMailTitle, string strMailContent, System.Text.Encoding mailEncoding)
        {
            
            bool bRes = false;
            if (string.Empty == strEMailTo)
             {                                    
                return bRes;
                throw new Exception("发送邮件的目标邮箱地址不能为空！");
             }
            try
            {
                System.Net.Mail.MailMessage mailMessage = new System.Net.Mail.MailMessage(strEmailFrom, strEMailTo);
                mailMessage.Subject = strMailTitle; //发送邮件主题
                mailMessage.Body = strMailContent;//邮件内容
                mailMessage.IsBodyHtml = true;
                if (mailEncoding != null)
                {
                    mailMessage.BodyEncoding = mailEncoding;
                    mailMessage.SubjectEncoding = mailEncoding;
                }
                else
                {
                    //默认使用UTF8编码
                    mailMessage.BodyEncoding = System.Text.Encoding.UTF8;
                    mailMessage.SubjectEncoding = System.Text.Encoding.UTF8;
                }

                System.Net.Mail.SmtpClient stmpClient = new System.Net.Mail.SmtpClient();
                stmpClient.Host = strEmailSmtp;
                stmpClient.UseDefaultCredentials = false;
                stmpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
                stmpClient.Credentials = new System.Net.NetworkCredential(strEmailFrom, strEmailPass);
                stmpClient.Send(mailMessage);
                bRes = true;
            }
            catch (System.Web.HttpException ehttp)
            {
                throw ehttp;
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return bRes;
        }