public class EmailHelper    {        /// <summary>        /// 发送邮件        /// </summary>        /// <param name="smtpServer">smtp服务器</param>        /// <param name="port">端口</param>        /// <param name="mailFrom">发件人邮箱</param>        /// <param name="userPassWord">密码</param>        /// <param name="mailTo">收件人</param>        /// <param name="strcc">抄送人</param>        /// <param name="strBcc">密送</param>        /// <param name="mailSubject">邮件主题</param>        /// <param name="mailContent">内容</param>        /// <param name="strs">附件</param>        /// <returns>发送成功返回true否则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            {                // 设置发送方的邮件信息                // 邮件服务设置                SmtpClient smtpClient = new SmtpClient();                smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;//指定电子邮件发送方式                smtpClient.Host = smtpServer; //指定SMTP服务器                smtpClient.Port = port;//端口                smtpClient.Credentials = new System.Net.NetworkCredential(mailFrom, userPassword);//验证用户名和密码                smtpClient.EnableSsl = true; //使用SSL                // 发送邮件设置                        MailMessage mailMessage = new MailMessage(mailFrom, mailTo); // 发送人和收件人                mailMessage.Subject = mailSubject;//主题                mailMessage.Body = mailContent;//内容                mailMessage.BodyEncoding = Encoding.UTF8;//正文编码                mailMessage.IsBodyHtml = true;//设置为HTML格式                mailMessage.PRiority = MailPriority.Normal;//优先级                //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); // 发送邮件                return true;            }            catch            {                return false;            }        }    }