Paul Howarth wrote:
On Wed, 23 Sep 2009 07:57:03 -0700
Daniel J Walsh <dwalsh@redhat.com> wrote:

  
On 09/23/2009 07:47 AM, John Griffiths wrote:
    
    2) SELinux is preventing sendmail (system_mail_t) "read" to
    /usr/share/GeoIP/GeoIP.dat (usr_t).

    Raw Audit Messages :

    node=elijah.suretrak21.net type=AVC
msg=audit(1253643380.763:60806): avc: denied { read } for pid=1311
comm="sendmail" path="/usr/share/GeoIP/GeoIP.dat" dev=dm-0
ino=663651 scontext=system_u:system_r:system_mail_t:s0
    tcontext=system_u:object_r:usr_t:s0 tclass=file

    node=elijah.suretrak21.net type=SYSCALL
msg=audit(1253643380.763:60806): arch=40000003 syscall=11
success=yes exit=0 a0=9ad05d0 a1=9acfd18 a2=9acfb08 a3=0 items=0
ppid=14784 pid=1311 auid=4294967295 uid=48 gid=48 euid=48 suid=48
fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) ses=4294967295
comm="sendmail" exe="/usr/sbin/sendmail.postfix"
subj=system_u:system_r:system_mail_t:s0 key=(null)

      
This one looks like a leak unless something is actually trying to
mail /usr/share/GeoIP/GeoIP.dat
    

Are you using milter-greylist by any chance?
  
Not using milter-greylist; package is not installed.
Paul.