diff --git a/conf/env.example b/conf/env.production.sample
similarity index 77%
rename from conf/env.example
rename to conf/env.production.sample
index a88e3ac..0449f03 100644
--- a/conf/env.example
+++ b/conf/env.production.sample
@@ -1,9 +1,9 @@
-POSTGRES_HOST=postgres
-POSTGRES_USERNAME=postgres
+POSTGRES_HOST=localhost
+POSTGRES_USERNAME=__DB_USER__
 REDIS_HOST=redis
 ELASTICSEARCH_HOST=elasticsearch
 
-SECRET_KEY_BASE=
+SECRET_KEY_BASE=__SECRET_KEY_BASE__
 
 SLOT_DURATION=60
 FEATURE_TOUR_DISPLAY=once
@@ -12,12 +12,12 @@ DEFAULT_HOST=__DOMAIN__
 DEFAULT_PROTOCOL=https
 
 DELIVERY_METHOD=smtp
-SMTP_ADDRESS=smtp-relay.brevo.com
-SMTP_PORT=587
-SMTP_USER_NAME=
-SMTP_PASSWORD=
-SMTP_AUTHENTICATION=plain
-SMTP_ENABLE_STARTTLS_AUTO=true
+SMTP_ADDRESS=localhost
+SMTP_PORT=25
+SMTP_USER_NAME=__APP__
+SMTP_PASSWORD=__MAIL_PWD__
+SMTP_AUTHENTICATION=none
+SMTP_ENABLE_STARTTLS_AUTO=false
 SMTP_OPENSSL_VERIFY_MODE=
 SMTP_TLS=false
 
@@ -44,7 +44,7 @@ OPENLAB_SSL_VERIFY=true
 LOG_LEVEL=debug
 RAILS_LOG_TO_STDOUT=true
 DISK_SPACE_MB_ALERT=1024
-ADMINSYS_EMAIL=
+ADMINSYS_EMAIL=__ADMIN_MAIL__
 ALLOW_INSECURE_HTTP=false
 ENABLE_SENTRY=false