diff --git a/docs/developing-server.md b/docs/developing-server.md
index 38ec5ad4f..38d94a426 100644
--- a/docs/developing-server.md
+++ b/docs/developing-server.md
@@ -56,9 +56,11 @@ NEXTAUTH_URL="http://localhost:8080/"
 
 You may need additional env for auth login. You may want to put your own one if you are not part of the AFFiNE team
 
+For email login & password, please refer to https://nodemailer.com/usage/using-gmail/
+
 ```
-OAUTH_EMAIL_LOGIN=
 OAUTH_EMAIL_SENDER=
+OAUTH_EMAIL_LOGIN=
 OAUTH_EMAIL_PASSWORD=
 OAUTH_GOOGLE_ENABLED="true"
 OAUTH_GOOGLE_CLIENT_ID=