diff --git a/README.md b/README.md
index 59ffe10..397e5d2 100644
--- a/README.md
+++ b/README.md
@@ -9,12 +9,11 @@ eapim-admin 에서 포함하여 테스트 이용시 느린 부팅 속도 떄문
 - 고객이메일발송 시스템 연계
 
 ## 테스트
-### testEmailInServer
 ```bash
 # git pull
 GIT_SSH_COMMAND='ssh -i ~/.ssh/id_rsa-jenkins' git pull origin jenkins_with_weblogic
 
 # test run
 KJB_EAPIM_TEST_ENABLED=TRUE kjb-gradle.sh :eapim-admin-kjb:test --tests "com.eactive.ext.kjb.ums.test.UmsTest.testSms" -Psafedb
-KJB_EAPIM_TEST_ENABLED=TRUE kjb-gradle.sh :eapim-admin-kjb:test --tests "com.eactive.ext.kjb.ums.test.UmsTest.testEmailInServer" -Psafedb
+KJB_EAPIM_TEST_ENABLED=TRUE kjb-gradle.sh :eapim-admin-kjb:test --tests "com.eactive.ext.kjb.ums.test.UmsTest.testEmail" -Psafedb
 ```
\ No newline at end of file
diff --git a/src/main/java/com/eactive/ext/kjb/ums/EmailJob.java b/src/main/java/com/eactive/ext/kjb/ums/EmailJob.java
index dc4d4fe..fb27084 100644
--- a/src/main/java/com/eactive/ext/kjb/ums/EmailJob.java
+++ b/src/main/java/com/eactive/ext/kjb/ums/EmailJob.java
@@ -50,7 +50,7 @@ public class EmailJob {
         this.messageRequest = messageRequest;
         this.prop = prop;
 
-        String filename = messageRequest.getServiceId() + "_" + DateTimeFormatter.ofPattern("yyyyMMddHHmmss").format(now);
+        String filename = messageRequest.getServiceId() + "_" + DateTimeFormatter.ofPattern("yyyyMMddHHmmss").format(now) + ".dat";
         this.eaiFilePath = Paths.get(prop.getUmsEaiBatchSendDir(), filename);
         this.backupFilePath = Paths.get(prop.getUmsEaiBatchBackupDir(), filename);
         this.failedFilePath = Paths.get(prop.getUmsEaiBatchBackupDir(), filename + ".failed");