it seems like all automatic generated links in mailings (open rate pic, trackable links, (un-)subscribe, profile) point to http://rdir.de - which is (at least for me) not working

Is it possible to change this? Or can you please point me to some documentation for this, since I can't find it in the pdf. There is only some mentioning in the german online help - but this seems to refer to features not available in the current version.
Thanks in advanve
TD
AGNITAS OpenEMM 5.0 on SuSe linux 10.1