public class EmailHelper    {        /// <summary>        /// 發送郵件        /// </summary>        /// <param name="smtpServer">smtp服務器</param>        /// <param name="port">端口</param>        /// <param name="mailFrom">發件人郵箱</param>        /// <param name="userPassWord">密碼</param>        /// <param name="mailTo">收件人</param>        /// <param name="strcc">抄送人</param>        /// <param name="strBcc">密送</param>        /// <param name="mailSubject">郵件主題</param>        /// <param name="mailContent">內容</param>        /// <param name="strs">附件</param>        /// <returns>發送成功返回true否則false</returns>        public static bool SendEmail(string smtpServer, int port, string mailFrom, string userPassword, string mailTo, string strcc,string strBcc,string mailSubject, string mailContent, string strs)        {            try            {                // 設置發送方的郵件信息                // 郵件服務設置                SmtpClient smtpClient = new SmtpClient();                smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;//指定電子郵件發送方式                smtpClient.Host = smtpServer; //指定SMTP服務器                smtpClient.Port = port;//端口                smtpClient.Credentials = new System.Net.NetworkCredential(mailFrom, userPassword);//驗證用戶名和密碼                smtpClient.EnableSsl = true; //使用SSL                // 發送郵件設置                        MailMessage mailMessage = new MailMessage(mailFrom, mailTo); // 發送人和收件人                mailMessage.Subject = mailSubject;//主題                mailMessage.Body = mailContent;//內容                mailMessage.BodyEncoding = Encoding.UTF8;//正文編碼                mailMessage.IsBodyHtml = true;//設置為HTML格式                mailMessage.PRiority = MailPriority.Normal;//優先級                //抄送人                if (!string.IsNullOrEmpty(strcc))                     mailMessage.CC.Add(strcc);                //密送                if (!string.IsNullOrEmpty(strBcc))                    mailMessage.Bcc.Add(strBcc);                 //附件                if (!string.IsNullOrEmpty(strs))                {                    List<string> paths = new List<string>();                    if (strs.Contains(","))                    {                        paths = strs.Split(',').ToList();                    }                    else                    {                        paths.Add(strs);                    }                    foreach (var path in paths)                    {                        mailMessage.Attachments.Add(new Attachment(strs));                    }                }                smtpClient.Send(mailMessage); // 發送郵件                return true;            }            catch            {                return false;            }        }    }