diff --git a/src/main/resources/application-dev.yml b/src/main/resources/application-dev.yml
index 00e06f3c..9ded2c4c 100644
--- a/src/main/resources/application-dev.yml
+++ b/src/main/resources/application-dev.yml
@@ -378,9 +378,9 @@ naverpay:
     real-url: https://pay.naver.com
 
 mail:
-  host: mail.soju1sake1.com
+  host: mail.sake1jan.com
   port: 587
-  username: custom@soju1sake1.com
+  username: custom@sake1jan.com
   password: mail13@$
   connectiontimeout: 10000
   timeout: 10000
diff --git a/src/main/resources/application-local.yml b/src/main/resources/application-local.yml
index cec75cd1..18ac0efa 100644
--- a/src/main/resources/application-local.yml
+++ b/src/main/resources/application-local.yml
@@ -379,9 +379,9 @@ naverpay:
     real-url: https://pay.naver.com
 
 mail:
-  host: mail.soju1sake1.com
+  host: mail.sake1jan.com
   port: 587
-  username: custom@soju1sake1.com
+  username: custom@sake1jan.com
   password: mail13@$
   connectiontimeout: 10000
   timeout: 10000
diff --git a/src/main/resources/application-stage.yml b/src/main/resources/application-stage.yml
index fe8d8396..30a6b6ac 100644
--- a/src/main/resources/application-stage.yml
+++ b/src/main/resources/application-stage.yml
@@ -380,7 +380,7 @@ naverpay:
 mail:
   host: 10.2.1.76
   port: 587
-  username: custom@soju1sake1.com
+  username: custom@sake1jan.com
   password: mail13@$
   connectiontimeout: 10000
   timeout: 10000