diff --git a/roles/msmtp/defaults/main.yml b/roles/msmtp/defaults/main.yml
index ef562fd..bf8f4d6 100644
--- a/roles/msmtp/defaults/main.yml
+++ b/roles/msmtp/defaults/main.yml
@@ -8,3 +8,6 @@ msmtp_smtp_server: "email.domain.tld"
 msmtp_smtp_from: "user@domain.tld"
 msmtp_smtp_user: "user@domain.tld"
 msmtp_smtp_password: "password"
+
+# Whether or not msmtp is inside a container
+msmtp_containerized: false