diff --git a/conf/install_postfix_advanced.conf.sample b/conf/install_postfix_advanced.conf.sample
index 705c153..07efbc6 100644
--- a/conf/install_postfix_advanced.conf.sample
+++ b/conf/install_postfix_advanced.conf.sample
@@ -14,4 +14,4 @@ _ADMIN_EMAIL=
 _SASL_AUTH=
 _SASL_USER=
 _SASL_PASS=
-_RELAY_HOST=
+_IS_RELAY_HOST=
diff --git a/conf/install_postfix_base.conf.sample b/conf/install_postfix_base.conf.sample
index 705c153..07efbc6 100644
--- a/conf/install_postfix_base.conf.sample
+++ b/conf/install_postfix_base.conf.sample
@@ -14,4 +14,4 @@ _ADMIN_EMAIL=
 _SASL_AUTH=
 _SASL_USER=
 _SASL_PASS=
-_RELAY_HOST=
+_IS_RELAY_HOST=