diff --git a/defaults/main.yml b/defaults/main.yml
index 799ffd8..7ad9ea8 100755
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -3,9 +3,9 @@ msmtp_version: 1.8.24-1
 msmtp_rpm_file: https://git.garbaye.fr/api/packages/Garbaye/generic/msmtp/{{ msmtp_version}}/msmtp-{{ msmtp_version}}.el8.{{ ansible_architecture }}.rpm
 
 # msmtprc configuration
-msmtp_auth: on
-msmtp_tls: on
-msmtp_tls_starttls: on
+msmtp_auth: 'on'
+msmtp_tls: 'on'
+msmtp_tls_starttls: 'on'
 
 msmtp_accounts:
     # Account 1 - it was a real account for testing (but yandex now blocks it)