net 群发 EMAIL

using System.Net.Mail;
protected void Page_Load(object sender, EventArgs e){
        string strAllEmail = "sdf,sdf,sdf,";
        string[] strEachEmail = strAllEmail.Split(',');
        int i_max=strEachEmail.Length;
        int i;
        for (i = 0; i < i_max;i++ )
             SendEmail(strEachEmail[i].ToString());
}

    private SendEmail(string astrEachEmail)  
     {
        //发送
        string strSendEmail = "發送者郵件地址";
        string strUserName = "申請人用戶名";
        string strPassWord = "申請人密碼";
        string strRecieveEMail = astrEachEmail;//"接收者郵件地址"
        string strSubject = "主題";
        string strBody = "內容";
         System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage();
         msg.To.Add(strRecieveEMail);
        ////附件處理
        //if (txtAttachment.Text.Trim().Length > 0)
        //{
        //     string FileName = @txtAttachment.Text.Trim();
        //     System.Net.Mail.Attachment pAttachment = new Attachment(FileName);
        //     msg.Attachments.Add(pAttachment);
        //}
         msg.From = new MailAddress(strSendEmail) ;
      
         msg.Subject = strSubject;//邮件标题           
         msg.SubjectEncoding = System.Text.Encoding.UTF8;//邮件标题编码
         msg.Body = strBody;//邮件内容
         msg.BodyEncoding = System.Text.Encoding.UTF8;//邮件内容编码
         msg.IsBodyHtml = false;//是否是HTML邮件
         msg.Priority = MailPriority.High;//邮件优先级

         SmtpClient client = new SmtpClient();
         client.Host = txtSmtp.Text.Trim();//为邮件服务器设置
         System.Net.NetworkCredential basicAuthenticationInfo = new System.Net.NetworkCredential(strUserName, strPassWord);
         client.Credentials = basicAuthenticationInfo;

        object userState = msg;
        try
         {
             client.Send(msg);
            //client.SendAsync(msg, userState);//简单一点儿可以client.Send(msg);
             Response.Write("成功发送到" + strRecieveEMail + "邮箱");
         }
        catch (System.Net.Mail.SmtpException ex)
         {
             Response.Write("发送邮件" + strRecieveEMail + "出错");
            throw ex;
         }
     }