asp.net 发送邮件的有关问题

    static string strHost = String.Empty;    static string strAccount = String.Empty;    static string strPwd = String.Empty;    static string strFrom = String.Empty;    /// <summary>    /// 发送邮件    /// </summary>    /// <param name="to">接收方邮件地址</param>    /// <param name="title">邮件标题</param>    /// <param name="content">邮件正文内容</param>    public static bool sendmail(string to, string title, string content)    {        strHost = "stmp.XXX.com";   //STMP服务器地址  //此处实际运用中用的是我们公司的邮件服务器（支持stmp）        strAccount = "X@XXX.com";       //SMTP服务帐号        strPwd = "123456";       //SMTP服务密码        strFrom = "X@XXX.com";  //发送方邮件地址        SmtpClient _smtpClient = new SmtpClient();        _smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;//指定电子邮件发送方式        _smtpClient.Host = strHost; ;//指定SMTP服务器        _smtpClient.Credentials = new System.Net.NetworkCredential(strAccount, strPwd);//用户名和密码        System.Net.Mail.MailMessage _mailMessage = new System.Net.Mail.MailMessage(strFrom, to);        _mailMessage.Subject = title;//主题        _mailMessage.Body = content;//内容        _mailMessage.BodyEncoding = System.Text.Encoding.UTF8;//正文编码        _mailMessage.IsBodyHtml = true;//设置为HTML格式        _mailMessage.Priority = MailPriority.High;//优先级        try        {            _smtpClient.Send(_mailMessage);            return true;        }        catch (Exception ex)        {                      return false;        }    }//提交    protected void btnadd_Click(object sender, ImageClickEventArgs e)    {        string title = Request.Form["title"].ToString().Trim();        string text = Request.Form["text"].ToString();        if (sendmail("我的邮箱@qq.com", title, text) == true)        {            base.Response.Write("<script>alert('您的意见已成功反馈，感谢您的支持！');location.href('" +Request.Url + "');</script>");        }        else        {            base.Response.Write("<script>alert('系统繁忙，请稍后再试！');location.href('" + Request.Url + "');</script>");                }    }

public bool SendSMTPEMail(string strSmtpServer, string strFrom, string strFromPass, string strto, string strSubject, string strBody)        {            System.Net.Mail.SmtpClient client = new SmtpClient(strSmtpServer);            client.Credentials = new System.Net.NetworkCredential(strFrom, strFromPass);            client.DeliveryMethod = SmtpDeliveryMethod.Network;                        System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(strFrom, strto, strSubject, strBody);            message.BodyEncoding = System.Text.Encoding.Default;            message.IsBodyHtml = true;            try            {                client.Send(message);                return true;            }            catch(Exception ex)            {                ErrorMsg = ex.ToString();                return false;            }        }