diff --git a/templates/main.cf.j2 b/templates/main.cf.j2
index ba5c027..949f24a 100644
--- a/templates/main.cf.j2
+++ b/templates/main.cf.j2
@@ -32,7 +32,7 @@ smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
 smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
 
 myhostname = {{ inventory_hostname }}
-mydomain = {{ ansible_domain }}
+mydomain = {{ postfix.mydomain|d(ansible_domain) }}
 myorigin = $mydomain
 mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 {{ postfix.mynetworks|d([])|join(' ') }}
 mydestination = {{ inventory_hostname_short }} {{ inventory_hostname }} localhost {{ postfix.mydestination|d([])|join(' ') }}