class SendEmail    {        static void Main(string[] args)        {            string from = "发件人@yingu.com";            string fromer = "赵海莹";            string to = "收件人@yingu.com";            string toer = "刘春喜";            string Subject = "逾期数据报表";            string file = string.Concat(System.AppDomain.CurrentDomain.BaseDirectory, "ReprotingTemp\\逾期订单列表.xls");            string Body = "逾期数据报表";            //企业邮箱smtp            string SMTPHost = "smtp.qiye.163.com";            string SMTPuser = "发件人@yingu.com";            string SMTPpass = "******（发件人邮箱密码）";            sendmail(from, fromer, to, toer, Subject, Body, file, SMTPHost, SMTPuser, SMTPpass);        }        /// 
        /// C#发送邮件函数        /// 
        /// 发送者邮箱        /// 发送人        /// 接受者邮箱        /// 收件人        /// 主题        /// 内容        /// 附件        /// smtp服务器        /// 邮箱        /// 密码        /// 
             private static bool sendmail(string sfrom, string sfromer, string sto, string stoer, string sSubject, string sBody, string sfile, string sSMTPHost, string sSMTPuser, string sSMTPpass)        {            ////设置from和to地址            MailAddress from = new MailAddress(sfrom, sfromer);            MailAddress to = new MailAddress(sto, stoer);            ////创建一个MailMessage对象            MailMessage oMail = new MailMessage(from, to);            //// 添加附件            if (sfile != "")            {                oMail.Attachments.Add(new Attachment(sfile));            }            ////邮件标题            oMail.Subject = sSubject;            ////邮件内容            oMail.Body = sBody;            ////邮件格式            oMail.IsBodyHtml = false;            ////邮件采用的编码            oMail.BodyEncoding = System.Text.Encoding.GetEncoding("GB2312");            ////设置邮件的优先级为高            oMail.Priority = MailPriority.High;            ////发送邮件            SmtpClient client = new SmtpClient();            ////client.UseDefaultCredentials = false;            client.Host = sSMTPHost;            //企业邮箱需设置端口，个人邮箱不需要            client.Port = 25;            client.Credentials = new NetworkCredential(sSMTPuser, sSMTPpass);            client.DeliveryMethod = SmtpDeliveryMethod.Network;            try            {                client.Send(oMail);                return true;            }            catch (Exception err)            {                //Response.Write(err.Message.ToString());                return false;            }            finally            {                ////释放资源                oMail.Dispose();            }        }    }