diff -up exim-4.63/src/configure.default.relaydomains exim-4.63/src/configure.default
--- exim-4.63/src/configure.default.relaydomains	2009-10-15 16:08:42.000000000 +0200
+++ exim-4.63/src/configure.default	2009-10-15 16:10:42.000000000 +0200
@@ -405,7 +405,7 @@ acl_check_rcpt:
   # relaying. Any other domain is rejected as being unacceptable for relaying.
 
   require message = relay not permitted
-          domains = +local_domains : +relay_domains
+          domains = +local_domains : +relay_to_domains
 
   # We also require all accepted addresses to be verifiable. This check will
   # do local part verification for local domains, but only check the domain