diff --git a/src/main/java/cokr/xit/ens/modules/kkotalk/service/support/KkoTalkApiService.java b/src/main/java/cokr/xit/ens/modules/kkotalk/service/support/KkoTalkApiService.java
index f8d5f05..fb7ddc6 100644
--- a/src/main/java/cokr/xit/ens/modules/kkotalk/service/support/KkoTalkApiService.java
+++ b/src/main/java/cokr/xit/ens/modules/kkotalk/service/support/KkoTalkApiService.java
@@ -11,6 +11,7 @@ import org.springframework.http.*;
 import org.springframework.stereotype.*;
 
 import cokr.xit.ens.core.exception.*;
+import cokr.xit.ens.core.exception.code.*;
 import cokr.xit.ens.core.utils.*;
 import cokr.xit.ens.modules.kkotalk.model.*;
 import lombok.*;
@@ -233,7 +234,7 @@ public class KkoTalkApiService {
         ResponseEntity<String> resEntity = null;
 
         if(Checks.isEmpty(reqDTO.getProductCode())){
-            return new ResponseEntity<String>("상품 코드는 필수 입니다.", HttpStatus.BAD_REQUEST);
+            return new ResponseEntity<String>("{\""+EnsErrCd.SEND405.getCode() +"\":\"상품 코드는 필수 입니다\"}", HttpStatus.BAD_REQUEST);
         }
 
         List<String> errors = new ArrayList<>();
@@ -275,7 +276,7 @@ public class KkoTalkApiService {
             }
         }
         if(!errors.isEmpty()){
-            return new ResponseEntity<String>(errors.toString(), HttpStatus.BAD_REQUEST);
+            return new ResponseEntity<String>("{\""+EnsErrCd.SEND405.getCode() +"\":" + errors.toString() +"}", HttpStatus.BAD_REQUEST);
         }
         String param = "{\"envelopes\":" + JsonUtils.toJson(envelopes) + "}";
         return webClient.exchangeKkotalk(
diff --git a/src/main/java/cokr/xit/ens/modules/kkotalk/service/support/KkoTalkSender.java b/src/main/java/cokr/xit/ens/modules/kkotalk/service/support/KkoTalkSender.java
index 6e36e1f..c40431b 100644
--- a/src/main/java/cokr/xit/ens/modules/kkotalk/service/support/KkoTalkSender.java
+++ b/src/main/java/cokr/xit/ens/modules/kkotalk/service/support/KkoTalkSender.java
@@ -93,7 +93,7 @@ public class KkoTalkSender extends SendProcTemplate {
                         sendRespBody = resp.getBody();
                         if (resp.getStatusCode() != HttpStatus.OK)
                             throw new EnsException(EnsErrCd.SEND620, String.format("전송요청 중.. %s %s", resp.getStatusCode().toString(), resp.getBody()));
-                        EnsResponseVO mResponse = this.respMsgToMap(resp.getBody());
+                        EnsResponseVO mResponse = this.respMsgToMap(sendRespBody);
                         if (!EnsErrCd.OK.equals(mResponse.getErrCode()))
                             throw new EnsException(mResponse.getErrCode(), mResponse.getErrMsg());
 
@@ -305,13 +305,13 @@ public class KkoTalkSender extends SendProcTemplate {
                 })
                 .collect(Collectors.toMap(m -> String.valueOf(m.get("key")), m -> (Long) m.get("value"), (k1, k2) -> k1));
 
-        EnsResponseVO<?> respVO = this.respMsgToMap(respMsg);
+        if(JsonUtils.isJson(respMsg)) {
+            EnsResponseVO<?> respVO = this.respMsgToMap(respMsg);
 
-
-        if (EnsErrCd.OK.equals(respVO.getErrCode())) {
-            Map<String, Object> mRespBody = (Map<String, Object>) respVO.getResultInfo();
-            List<Map<String, String>> documents = (List<Map<String, String>>) mRespBody.get("envelopeIds");
-            Map<String, Map<String, String>> mRespMsg = documents.stream()
+            if (EnsErrCd.OK.equals(respVO.getErrCode())) {
+                Map<String, Object> mRespBody = (Map<String, Object>)respVO.getResultInfo();
+                List<Map<String, String>> documents = (List<Map<String, String>>)mRespBody.get("envelopeIds");
+                Map<String, Map<String, String>> mRespMsg = documents.stream()
                     .map(row -> {
                         Map<String, Object> m = new HashMap<>();
                         m.put("key", String.valueOf(row.get("externalId")));
@@ -323,9 +323,11 @@ public class KkoTalkSender extends SendProcTemplate {
                         m.put("value", mValue);
                         return m;
                     })
-                    .collect(Collectors.toMap(m -> String.valueOf(m.get("key")), m -> (Map<String, String>) m.get("value"), (k1, k2) -> k1));
+                    .collect(
+                        Collectors.toMap(m -> String.valueOf(m.get("key")), m -> (Map<String, String>)m.get("value"),
+                            (k1, k2) -> k1));
 
-            return sendMsgList.stream()
+                return sendMsgList.stream()
                     .map(row -> {
                         //
                         //Map<String, String> property = (Map<String, String>) row.get("property");
@@ -333,40 +335,59 @@ public class KkoTalkSender extends SendProcTemplate {
                         boolean isSuccess = CmmnUtil.isEmpty(mRespMsg.get(externalId).get("errorCode"));
 
                         return SendDetailKkoTalkReqHist.builder()
-                                .sendDetailId(mSendDetailIds.get(externalId))
-                                .sendRawMsg(gson.toJson(row))
-                                .externalId(externalId)
-                                .envelopeId(mRespMsg.get(externalId).get("envelopeId"))
-                                .respRawMsg(mRespMsg.get(externalId).get("rawMsg"))
-                                .error(FieldError.initBuilder()
-                                        .errorCode(isSuccess ? null : EnsErrCd.SEND620.getCode())
-                                        .errorMessage(isSuccess ? null : String.format("%s %s"
-                                                , mRespMsg.get(externalId).get("errorCode")
-                                                , mRespMsg.get(externalId).get("errorMessage")
-                                        ))
-                                        .build())
-                                .build();
+                            .sendDetailId(mSendDetailIds.get(externalId))
+                            .sendRawMsg(gson.toJson(row))
+                            .externalId(externalId)
+                            .envelopeId(mRespMsg.get(externalId).get("envelopeId"))
+                            .respRawMsg(mRespMsg.get(externalId).get("rawMsg"))
+                            .error(FieldError.initBuilder()
+                                .errorCode(isSuccess ? null : EnsErrCd.SEND620.getCode())
+                                .errorMessage(isSuccess ? null : String.format("%s %s"
+                                    , mRespMsg.get(externalId).get("errorCode")
+                                    , mRespMsg.get(externalId).get("errorMessage")
+                                ))
+                                .build())
+                            .build();
                     })
                     .collect(Collectors.toList());
 
-        } else {
-            return sendMsgList.stream()
+            } else {
+                return sendMsgList.stream()
                     .map(row -> {
                         //Map<String, String> property = (Map<String, String>) row.get("property");
                         String externalId = (String)row.get("externalId");
 
                         return SendDetailKkoTalkReqHist.builder()
-                                .sendDetailId(mSendDetailIds.get(externalId))
-                                .sendRawMsg(gson.toJson(row))
-                                .externalId(externalId)
-                                .respRawMsg(respMsg)
-                                .error(FieldError.initBuilder()
-                                        .errorCode(respVO.getErrCode().getCode())
-                                        .errorMessage(respVO.getErrMsg())
-                                        .build())
-                                .build();
+                            .sendDetailId(mSendDetailIds.get(externalId))
+                            .sendRawMsg(gson.toJson(row))
+                            .externalId(externalId)
+                            .respRawMsg(respMsg)
+                            .error(FieldError.initBuilder()
+                                .errorCode(respVO.getErrCode().getCode())
+                                .errorMessage(respVO.getErrMsg())
+                                .build())
+                            .build();
                     })
                     .collect(Collectors.toList());
+            }
+        }else{
+            return sendMsgList.stream()
+                .map(row -> {
+                    //Map<String, String> property = (Map<String, String>) row.get("property");
+                    String externalId = (String)row.get("externalId");
+
+                    return SendDetailKkoTalkReqHist.builder()
+                        .sendDetailId(mSendDetailIds.get(externalId))
+                        .sendRawMsg(gson.toJson(row))
+                        .externalId(externalId)
+                        .respRawMsg(respMsg)
+                        .error(FieldError.initBuilder()
+                            .errorCode("")
+                            .errorMessage(respMsg)
+                            .build())
+                        .build();
+                })
+                .collect(Collectors.toList());
         }
     }
 
@@ -377,7 +398,7 @@ public class KkoTalkSender extends SendProcTemplate {
         try {
             mResp = gson.fromJson(respMsg, Map.class);
             if (CmmnUtil.isEmpty(mResp.get("envelopeIds")))
-                throw new EnsException(EnsErrCd.SEND620, String.format("전송요청API 오류. documents 키값이 없습니다. %s", respMsg));
+                throw new EnsException(EnsErrCd.SEND620, String.format("전송요청API 오류. envelopeId 키값이 없습니다. %s", respMsg));
         } catch (EnsException e) {
             errCode = e.getErrCd();
             errMsg = e.getMessage();