diff --git a/.env.development b/.env.development
index d821f10..d4d77fb 100644
--- a/.env.development
+++ b/.env.development
@@ -11,6 +11,7 @@ NEXT_PUBLIC_QSP_API_URL=http://1.248.227.176:8120
 #1:1문의 api
 NEXT_PUBLIC_INQUIRY_API_URL=https://jp-dev.qsalesplatform.com
 
+EMAIL_TITLE_PREFIX=(System Test)
 
 #QPARTNER 로그인 api
 DB_HOST=202.218.61.226
diff --git a/.env.localhost b/.env.localhost
index 1480c7a..eb993b5 100644
--- a/.env.localhost
+++ b/.env.localhost
@@ -11,6 +11,8 @@ NEXT_PUBLIC_QSP_API_URL=http://1.248.227.176:8120
 #1:1문의 api
 NEXT_PUBLIC_INQUIRY_API_URL=https://jp-dev.qsalesplatform.com
 
+EMAIL_TITLE_PREFIX=
+
 #QPARTNER 로그인 api
 DB_HOST=202.218.61.226
 DB_USER=readonly
diff --git a/.env.production b/.env.production
index fc11d33..1835dc5 100644
--- a/.env.production
+++ b/.env.production
@@ -9,6 +9,8 @@ NEXT_PUBLIC_QSP_API_URL=https://jp.qsalesplatform.com
 #1:1문의 api
 NEXT_PUBLIC_INQUIRY_API_URL=http://172.23.4.129:8110
 
+EMAIL_TITLE_PREFIX=
+
 #QPARTNER 로그인 api
 DB_HOST=202.218.61.226
 DB_USER=readonly