diff -Naur a/conf/main.cf b/conf/main.cf
--- a/conf/main.cf	2017-02-18 19:58:20.000000000 -0600
+++ b/conf/main.cf	2018-06-06 18:43:23.134275240 -0500
@@ -398,7 +398,7 @@
 # "postfix reload" to eliminate the delay.
 #
 #alias_maps = dbm:/etc/aliases
-#alias_maps = hash:/etc/aliases
+alias_maps = hash:/etc/aliases
 #alias_maps = hash:/etc/aliases, nis:mail.aliases
 #alias_maps = netinfo:/aliases