diff --git a/bundles/postfix/files/main.cf b/bundles/postfix/files/main.cf
index 072d685..105077d 100644
--- a/bundles/postfix/files/main.cf
+++ b/bundles/postfix/files/main.cf
@@ -33,8 +33,8 @@ smtpd_sasl_auth_enable = yes
 
 smtpd_tls_security_level = may
 smtpd_tls_auth_only = yes
-smtpd_tls_cert_file = /var/lib/dehydrated/certs/${node.metadata.get('mailserver/hostname')}/fullchain.pem
-smtpd_tls_key_file = /var/lib/dehydrated/certs/${node.metadata.get('mailserver/hostname')}/privkey.pem
+smtpd_tls_cert_file = /var/lib/dehydrated/certs/${hostname}/fullchain.pem
+smtpd_tls_key_file = /var/lib/dehydrated/certs/${hostname}/privkey.pem
 smtp_tls_security_level = may
 
 smtpd_restriction_classes = mua_sender_restrictions, mua_client_restrictions, mua_helo_restrictions