diff --git a/conf/environ b/conf/environ
index 041527b..c988ca7 100644
--- a/conf/environ
+++ b/conf/environ
@@ -16,7 +16,7 @@ export PENPOT_SMTP_DEFAULT_REPLY_TO=Penpot <__APP__@__DOMAIN__>
 export PENPOT_SMTP_DEFAULT_FROM=Penpot <__APP__@__DOMAIN__>
 export PENPOT_SMTP_HOST=localhost
 export PENPOT_SMTP_PORT=587
-export PENPOT_SMTP_USERNAME=__MAIL_USER__
+export PENPOT_SMTP_USERNAME=__APP__
 export PENPOT_SMTP_PASSWORD=__MAIL_PWD__
 export PENPOT_SMTP_TLS=true
 export PENPOT_ASSETS_STORAGE_BACKEND=assets-fs