diff --git a/apps/mailserver/15.0.2/data.yml b/apps/mailserver/15.0.2/data.yml
index ea19fb9b6..3ed3d33a2 100644
--- a/apps/mailserver/15.0.2/data.yml
+++ b/apps/mailserver/15.0.2/data.yml
@@ -177,7 +177,7 @@ additionalProperties:
       type: text
     - default: ""
       edit: true
-      envKey: http_proxy
+      envKey: HTTP_PROXY
       labelZh: 网络代理
       labelEn: Network proxy
       required: false