public async Task <IActionResult> Send(SendRequest sendRequest)
        {
            //初使化
            Initialize(sendRequest);

            var email = EmailSend
                        .From(sendRequest.FromEmail)
                        .To(sendRequest.ToEmail)
                        .Body(sendRequest.Body, true);

            //使用模板发送
            if (sendRequest.TemplateModel != null && !string.IsNullOrEmpty(sendRequest.Template))
            {
                email.UsingTemplate(sendRequest.Template, sendRequest.TemplateModel);
            }

            //发送附件
            if (sendRequest.Attachment != null)
            {
                email.Attach(sendRequest.Attachment);
            }

            var response = await email.SendAsync();

            return(new JsonResult(response));
        }