diff --git a/install/debian/11/exim/exim4.conf.template-RC b/install/debian/11/exim/exim4.conf.template-RC
index e16099bd..5a4d0414 100644
--- a/install/debian/11/exim/exim4.conf.template-RC
+++ b/install/debian/11/exim/exim4.conf.template-RC
@@ -145,7 +145,7 @@ acl_check_rcpt:
   
   warn    !authenticated = *
           hosts          = !+relay_from_hosts
-          condition     = ${lookup{$local_part@$domain}lsearch{/etc/exim4/domains/$domain/aliases}{true}{false}}
+          condition     = ${lookup{$local_part@$domain}lsearch{/etc/exim4/domains/${lookup{$domain}dsearch{/etc/exim4/domains/}}/aliases}{true}{false}}
           set acl_m3    = yes
 
   deny    message       = Restricted characters in address