"EmailOptions": {
   "SenderName": "系統郵件", //發送者名稱，可在代碼中重新替換
   "FromAddress": "@qq.com", //發件者郵箱
   "ToAddress": "", //接收人郵箱
   "Host": "smtp.qq.com", //主機
   "Port": 465, //端口 阿里云默認25端口不開放，需要使用SSL的465端口
   "UserName": "@qq.com", //發件郵箱賬號
   "Password": "" //發件郵箱密碼
 },

public class EmailOptions
    {
        public string FromAddress { get; set; }
        public string ToAddress { get; set; }
        public string Host { get; set; }
        public string UserName { get; set; }
        public string Password { get; set; }
    }

            #region 注冊郵件服務

            services.Configure<EmailOptions>(Configuration.GetSection("EmailOptions"));
            services.AddMailKit(optionBuilder =>
            {
                optionBuilder.UseMailKit(new MailKitOptions()
                {
                    Server = Configuration.GetValue<string>("EmailOptions:Host"),
                    Port = Configuration.GetValue<int>("EmailOptions:Port"),
                    SenderName = Configuration.GetValue<string>("EmailOptions:SenderName"),
                    SenderEmail = Configuration.GetValue<string>("EmailOptions:FromAddress"),
                    // can be optional with no authentication
                    Account = Configuration.GetValue<string>("EmailOptions:UserName"),
                    Password = Configuration.GetValue<string>("EmailOptions:Password"),
                    // enable ssl or tls
                    Security = true
                });
            });

            #endregion 注冊郵件服務

  /// <summary>
  /// 會員注冊郵箱驗證碼
  /// </summary>
  /// <param name="emial"></param>
  /// <returns></returns>
  [AllowAnonymous]
  [HttpGet, Route("API/ValidateCodeEmail")]
  public async Task<object> ValidateCodeEmail(string email)
  {
      try
      {
          string code = "";
          VierificationCodeServices _vierificationCodeServices = new VierificationCodeServices();
          System.IO.MemoryStream ms = _vierificationCodeServices.Create(out code);
          new CacheHelper().AddCaChe("webRegisterValidateCode", code);
          if (string.IsNullOrEmpty(email))
          {
              result.success = false;
              result.msg = "請輸入正確的郵箱";
              return result;
          }
          Regex emailRegex = new Regex(@"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$");
          if (!emailRegex.IsMatch(email))
          {
              result.success = false;
              result.msg = "請輸入正確的郵箱";
              return result;
          }
          string subj = "綁定郵箱帳號驗證碼";
          string bodys = $"您好，本次操作校驗碼為{code}。您正在使用綁定郵箱帳號，如非本人操作，請忽略。";
          var sendInfo = new SenderInfo
          {
              SenderEmail = emailoptions.FromAddress,
              SenderName = "郵箱帳號驗證碼",
          };
          emailoptions.ToAddress = email;

          await _EmailService.SendAsync(emailoptions.ToAddress, subj, bodys, false);
          result.success = true;
          //發送郵件
          return result;
      }
      catch (Exception ex)
      {
          result.success = false;
          result.msg = "發送信息失敗，請檢查郵箱" + ex.Message;
          return result;
      }
  }