[exim] exim4 remote host address is the local host

Hello i install exim4 in a production system with a config that has
allredy run well.
now my problem is the following error, the mails are send my local users
like postmaster or root.

2013-01-14 15:56:19 1TulSV-00088L-Jw <= root@???
U=root P=local S=506
2013-01-14 15:56:19 1TulSV-00088L-Jw remote host address is the local
host: server1.mydomain.example
2013-01-14 15:56:19 1TulSV-00088L-Jw == root@???
R=dnslookup defer (-1): remote host address is the local host
2013-01-14 15:56:19 1TulSV-00088S-OH <= <> R=1TulSV-00088L-Jw
U=Debian-exim P=local S=605
2013-01-14 15:56:19 1TulSV-00088L-Jw Frozen

an other try, to pipe the mails to /dev/null in /etc/aliases are also
failed with the error

2013-01-14 15:08:24 1Tuki8-00076N-0K <= root@???
U=root P=local S=513
2013-01-14 15:08:24 1Tuki8-00076N-0K == /dev/null <root@localhost>
R=system_aliases defer (-30): file_transport unset in system_aliases router

how can i fix this?
thanks for help