[Exim] Exim on OS X Server 10.2.2

I installed Exim on OS X Server 10.2.2, and I keep getting these kinds of
errors when I try to receive mail:

unable to set gid=20 or uid=125 (euid=25): local delivery to dave
<dave@???> transport=local_delivery

failed to read delivery status for dave@??? from delivery subprocess

Any clues as to why this is happening? I can send mail just fine, but I
can't seem to receive it. I just can't figure it out.

Thanks in advance,

Dave Larson