diff --git a/pillar/role/mta/postfix.sls b/pillar/role/mta/postfix.sls
index 51e7afc..a992440 100644
--- a/pillar/role/mta/postfix.sls
+++ b/pillar/role/mta/postfix.sls
@@ -11,6 +11,7 @@ postfix:
     inet_interfaces: loopback-only
     # to-do: support relay via IPv6
     inet_protocols: ipv4
+    alias_database: lmdb:/etc/aliases
     alias_maps: lmdb:/etc/aliases
     smtpd_use_tls: 'no'
     smtp_use_tls: 'yes'