[exim] remote host address is the local host

Hi,

for a long time I use an exim mailsever, for one outgoing mail I get the
following error and I don't understand why. Maybe you can help me:

2015-01-22 14:37:37 1YEHx2-0002Pl-PO <= Recipient@xxx H=(mx.xxx.net)
[xxx.xxx.xxx.xxx] P=esmtp S=606 id=782374@???
2015-01-22 14:37:37 1YEHx2-0002Pl-PO remote host address is the local host:
smtp.myserver.de
2015-01-22 14:37:37 1YEHx2-0002Pl-PO == postmaster@???
<Recipient@???> R=dnslookup defer (-1): remote host address is the local
host
2015-01-22 14:37:37 1YEHx2-0002Pl-PO ** postmaster@???
<Recipient@???>: retry timeout exceeded
2015-01-22 14:37:37 1YEHx3-0002Pn-4z <= <> R=1YEHx2-0002Pl-PO U=mail
P=local S=1504
2015-01-22 14:37:37 1YEHx2-0002Pl-PO Completed

thx

chris