[Exim] Have I been Hacked

There is a file in the /usr/exim/spool/msg directory that looks very
strange.
User/group are numbers, file size is wacked and the date in way in the
future.
I can't view it or delete it.. I even tried booting into single user mode.
There are the file details..

b--xrw-rwt  1 1510633525  1668760147          1044,80,304 Apr  5  2005
13KxKN-0004xw-00

Regards,
Ed Zimmermann
Network Operations Manager
Internet Specialties West
818.735.3000v
818.735.3004f