diff --git a/axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/adapter/sender/HttpEimsSender.java b/axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/adapter/sender/HttpEimsSender.java
index 848709d..2e517bb 100644
--- a/axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/adapter/sender/HttpEimsSender.java
+++ b/axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/adapter/sender/HttpEimsSender.java
@@ -40,7 +40,14 @@ public class HttpEimsSender implements EimsSender {
         this.glowProps = glowProps;
         // yml의 대내 MCI host, port, uri를 조합하여 EIMS 호출 주소 생성
         this.eimsUrl = glowProps.getMci().getHost() + ":" + glowProps.getMci().getPort() + glowProps.getMci().getUri();
-        
+
+        /*
+        *********************************************** 중요 **************************************************
+        this.restClient = RestClient.create();
+        보통 금융권(신한라이프 등 은행/보험사)의 내부 레거시 시스템이나 MCI(Message Channel Integration) 솔루션은 HTTP/2를 기본으로 지원하지 않는 경우가 훨씬 많습니다.
+        *********************************************** 중요 **************************************************
+         */
+
         // HTTP/2 통신 시 Stream Cancelled(RST_STREAM) 에러 방지를 위해 HTTP/1.1 전용 Factory 사용
         SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
         factory.setConnectTimeout(3000);
diff --git a/axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/adapter/sender/MciEimsSender.java b/axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/adapter/sender/MciEimsSender.java
index f9511c4..2e4c6fa 100644
--- a/axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/adapter/sender/MciEimsSender.java
+++ b/axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/adapter/sender/MciEimsSender.java
@@ -6,6 +6,7 @@ import com.fasterxml.jackson.dataformat.xml.XmlMapper;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.http.MediaType;
+import org.springframework.http.client.SimpleClientHttpRequestFactory;
 import org.springframework.stereotype.Service;
 import org.springframework.util.StopWatch;
 import org.springframework.web.client.RestClient;
@@ -38,6 +39,16 @@ public class MciEimsSender implements EimsSender {
         this.xmlMapper = xmlMapper;
         this.mciUrl = mciUrl;
         this.restClient = RestClient.create(); // 클라이언트 초기화
+
+        /*
+        *********************************************** 중요 **************************************************
+        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
+        factory.setConnectTimeout(3000);
+        factory.setReadTimeout(5000);
+        this.restClient = RestClient.builder().requestFactory(factory).build();
+        보통 금융권(신한라이프 등 은행/보험사)의 내부 레거시 시스템이나 MCI(Message Channel Integration) 솔루션은 HTTP/2를 기본으로 지원하지 않는 경우가 훨씬 많습니다.
+        *********************************************** 중요 **************************************************
+         */
     }
 
     @Override
diff --git a/axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/adapter/sender/MciStringEimsSender.java b/axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/adapter/sender/MciStringEimsSender.java
index 342da8b..3f6b899 100644
--- a/axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/adapter/sender/MciStringEimsSender.java
+++ b/axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/adapter/sender/MciStringEimsSender.java
@@ -31,6 +31,16 @@ public class MciStringEimsSender implements EimsSender {
     public MciStringEimsSender(@Value("${eims.mcistring.url}") String mciUrl) {
         this.mciUrl = mciUrl;
         this.restClient = RestClient.create();
+        /*
+        *********************************************** 중요 **************************************************
+        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
+        factory.setConnectTimeout(3000);
+        factory.setReadTimeout(5000);
+        this.restClient = RestClient.builder().requestFactory(factory).build();
+        보통 금융권(신한라이프 등 은행/보험사)의 내부 레거시 시스템이나 MCI(Message Channel Integration) 솔루션은 HTTP/2를 기본으로 지원하지 않는 경우가 훨씬 많습니다.
+        *********************************************** 중요 **************************************************
+         */
+
     }
 
     @Override