diff --git a/docker/.env.example b/docker/.env.example
index 48288c556f..7ff82530fa 100644
--- a/docker/.env.example
+++ b/docker/.env.example
@@ -405,7 +405,7 @@ RESEND_API_KEY=your-resend-api-key
 
 # SMTP server configuration, used when MAIL_TYPE is `smtp`
 SMTP_SERVER=
-SMTP_PORT=
+SMTP_PORT=465
 SMTP_USERNAME=
 SMTP_PASSWORD=
 SMTP_USE_TLS=true