diff --git a/.env.sample b/.env.sample
index 3f14cba..32fc78c 100644
--- a/.env.sample
+++ b/.env.sample
@@ -10,8 +10,10 @@ PEERTUBE_WEBSERVER_HTTPS=true
 PEERTUBE_ADMIN_EMAIL=admin@example.com
 PEERTUBE_SIGNUP_ENABLED=false
 PEERTUBE_TRANSCODING_ENABLED=true
-PEERTUBE_SMTP_HOSTNAME=smtpd
-PEERTUBE_SMTP_PORT=25
-PEERTUBE_SMTP_FROM=peertube@example.com
-PEERTUBE_SMTP_TLS=false
-PEERTUBE_SMTP_DISABLE_STARTTLS=true
+
+## E-mail settings
+#PEERTUBE_SMTP_HOSTNAME=postfix_relay_app
+#PEERTUBE_SMTP_PORT=25
+#PEERTUBE_SMTP_FROM=peertube@example.com
+#PEERTUBE_SMTP_TLS=false
+#PEERTUBE_SMTP_DISABLE_STARTTLS=true