[Exim] What does that mean?

Hi,

all of a sudden exim 4. is producing this log output and didn't deliver
mails anymore???

2002-08-08 14:59:13 17cmsj-0000Sk-00 unable to set gid=101 or uid=501
(euid=501): post-delivery tidying
2002-08-08 14:59:14 17cmsk-0000Sv-00 unable to set gid=101 or uid=501
(euid=501): local delivery to daniela.schmidt
<daniela.schmidt@???> tr
ansport=virtuell_transport
2002-08-08 14:59:14 17cmsk-0000Sv-00 failed to read delivery status for
daniela.schmidt@??? from delivery subprocess

Any ideas?

DANIEL