/// <summary>

        /// 发送邮件

        /// </summary>

        /// <param name="fromMail">发件人邮箱</param>

        /// <param name="toMail">收件人邮箱</param>

        /// <param name="authorizationCode">发件人授权码</param>

        /// <param name="replyTo">收件人回复邮件默认接收地址（不设置也可以）</param>

        /// <param name="ccMail">邮件抄送人</param>

        /// <param name="filePath">附件地址</param>

        /// <param name="sendPeopleCall">收件人称呼</param>

        /// <param name="collectSampleDate">收样时间</param>

        /// <returns></returns>

        public MsgModel SendMails(string fromMail,List<string> toMail,string authorizationCode,string replyTo, List<string> ccMail,List<string> filePath,string sendPeopleCall,string collectSampleDate)

        {

            try

            {

                //实例化发送邮件类

                MailMessage mailMessage = new MailMessage();

                //邮件的优先级 分为 low normal high 通常用Normal即可

                mailMessage.Priority = MailPriority.Normal;

                //发送人邮件地址

                mailMessage.From = new MailAddress(fromMail);

                //收件人邮件地址 //考虑群发邮件

                foreach(var r in toMail)

                {

                    mailMessage.To.Add(new MailAddress(r));

                }

                if (replyTo == "" || replyTo == null)

                {

                    replyTo = fromMail;

                }

                //对方回复邮件时默认的接收地址（可以不设置）

                //mailMessage.ReplyTo = new MailAddress(replyTo);

                if (ccMail != null)

                {

                    //邮件抄送  支持 群发 抄送

                    foreach (var r in ccMail)

                    {

                        mailMessage.CC.Add(r);

                    }

                }

                //如果邮件标题包含中文，这里要设置编码方式 否则会出现乱码

                mailMessage.SubjectEncoding = Encoding.GetEncoding();

                //邮件正文是否是Html 格式

                mailMessage.IsBodyHtml = true;

                //邮件标题

                mailMessage.Subject = $@" REPORT-{collectSampleDate}";

                //邮件内容

                mailMessage.Body = $@"

                                    Dear {sendPeopleCall},

                                    ";

                mailMessage.Attachments.Clear();

                if (filePath != null&&filePath.Count>)

                {

                    foreach (var r in filePath)

                    {

                        var urls = System.AppDomain.CurrentDomain.BaseDirectory.ToString() + r;//获取项目的绝对

                        //将附件添加到邮件

                        mailMessage.Attachments.Add(new Attachment(urls));

                        //获取设置此电子邮件的发送通知

                        mailMessage.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess;

                    }

                }

                //实例化 SmtpClient类

                SmtpClient client = new SmtpClient();

                client.Host = GetClientHost(fromMail);

                //使用安全加密连接

                client.EnableSsl = true;

                client.Port = ;//默认是25 此处设置成587

                //不和请求一块发送

                client.UseDefaultCredentials = false;

                //client.DeliveryMethod = SmtpDeliveryMethod.Network;

                //验证发送人身份（发件人的邮箱，邮箱里生成的授权码）

                client.Credentials = new NetworkCredential(fromMail,authorizationCode);

                //如果发送失败，SMTP 服务器将发送 失败邮件告知fromEmail

                mailMessage.DeliveryNotificationOptions= DeliveryNotificationOptions.OnFailure;

                client.Send(mailMessage);

                return new MsgModel

                {

                    Status = true,

                    Msg = "发送邮件成功" ,

                    Data = ""

                };

            }

            catch(Exception ex)

            {

                return new MsgModel

                {

                    Status = false,

                    Msg = "发送邮件失败！错误：" + ex.Message,

                    Data=""

                };

            }

        }

         /// <summary>

        /// 根据发送邮箱 识别发件服务器地址

        /// </summary>

        /// <param name="fromEmail"></param>

        /// <returns></returns>

        public string GetClientHost(string fromEmail)

        {

            var host = "";

            if (fromEmail.Length != )

            {

                var addressStr = fromEmail.Trim().Split(new char[] { '@','.'});

                switch (addressStr[])

                {

                    case "":

                        host = "smtp.163.com";

                        break;

                    case "":

                        host = "smtp.126.com";

                        break;

                    case "qq":

                        host = "smtp.qq.com";

                        break;

                    case "gmail":

                        host = "smtp.gmail.com";

                        break;

                    case "hotmail":

                        host = "smtp.live.com";//outlook邮箱

                                                      //client.Port = 587;

                        break;

                    case "foxmail":

                        host = "smtp.foxmail.com";

                        break;

                    case "sina":

                        host = "smtp.sina.com.cn";

                        break;

                    default:

                        host = "smtp.exmail.qq.com";//qq企业邮箱

                        break;

                }

            }

            return host;

        }