diff --git a/backend/src/main/resources/application.properties b/backend/src/main/resources/application.properties
index dbfc88ec1..2c62040cf 100644
--- a/backend/src/main/resources/application.properties
+++ b/backend/src/main/resources/application.properties
@@ -56,7 +56,7 @@ app.captcha.comment-enabled=${CAPTCHA_COMMENT_ENABLED:false}
 # ========= Optional =========
 # for resend email send service, you can improve your service by yourself
 resend.api.key=${RESEND_API_KEY:}
-resend.from.email=${RESEND.FROM.EMAIL}
+resend.from.email=${RESEND_FROM_EMAIL:}
 # your email services: ...
 
 # for tencent cloud image upload service, you can improve your service by yourself