diff --git a/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/correct.pass.sh b/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/correct.pass.sh
index 2c263e4dadf7..28fb54b2f07a 100644
--- a/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/correct.pass.sh
+++ b/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/correct.pass.sh
@@ -2,3 +2,5 @@
 # packages = postfix
 
 echo "inet_interfaces = loopback-only" > /etc/postfix/main.cf
+systemctl enable postfix
+systemctl start postfix
diff --git a/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/correct_commented.fail.sh b/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/correct_commented.fail.sh
index 92472f26ba73..7e7eab9e818a 100644
--- a/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/correct_commented.fail.sh
+++ b/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/correct_commented.fail.sh
@@ -2,4 +2,5 @@
 # packages = postfix
 
 echo "#inet_interfaces = loopback-only" > /etc/postfix/main.cf
-echo "inet_interfaces = something_different" >> /etc/postfix/main.cf
+systemctl enable postfix
+systemctl start postfix
diff --git a/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/wrong.fail.sh b/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/wrong.fail.sh
index f8ce16ba9bb1..cd1f2cae59a3 100644
--- a/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/wrong.fail.sh
+++ b/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/wrong.fail.sh
@@ -1,4 +1,6 @@
 #!/bin/bash
 # packages = postfix
 
-echo "inet_interfaces = some_different_interface,loopback-only" > /etc/postfix/main.cf
+echo "inet_interfaces = all" > /etc/postfix/main.cf
+systemctl enable postfix
+systemctl start postfix
diff --git a/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/wrong_but_disabled.pass.sh b/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/wrong_but_disabled.pass.sh
new file mode 100644
index 000000000000..5fb37d11601e
--- /dev/null
+++ b/linux_os/guide/services/mail/postfix_client/postfix_network_listening_disabled/tests/wrong_but_disabled.pass.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+# packages = postfix
+
+echo "inet_interfaces = all" > /etc/postfix/main.cf
+systemctl stop postfix
+systemctl disable postfix