diff -urN ../exim-4.89.orig/src/acl.c ./src/acl.c
--- ../exim-4.89.orig/src/acl.c	2017-03-04 23:21:35.000000000 +0200
+++ ./src/acl.c	2017-03-10 11:41:13.000000000 +0200
@@ -3864,7 +3864,7 @@
 
 /* Catch configuration loops */
 
-if (acl_level > 20)
+if (acl_level > 200)
   {
   *log_msgptr = US"ACL nested too deep: possible loop";
   return ERROR;