exim permissions error

When I see this:

login as: root
root@64.254.200.10's password:
Last login: Mon Aug 31 15:44:06 2009 from adsl-70-131-140-218.dsl.emhril.sbcglob al.net
[root@ls3 ~]# 2009-08-31 15:45:42 1MiDl0-0001b0-SA Failed to create spool file / var/spool/exim/input//1MiDl0-0001b0-SA-D: Permission denied
[root@ls3 ~]#


I do this (temporarily):
chmod -R 777 /var/spool/exim
because this does not work:
chmod -R 755 /var/spool/exim