SELinux is preventing /usr/bin/spamc from 'read' accesses on the fifo_file fifo_file.

*****  Plugin catchall (50.5 confidence) suggests  ***************************

If you believe that spamc should be allowed read access on the fifo_file fifo_file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# grep spamc /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

*****  Plugin leaks (50.5 confidence) suggests  ******************************

If you want to ignore spamc trying to read access the fifo_file fifo_file, because you believe it should not need this access.
Then you should report this as a bug.  
You can generate a local policy module to dontaudit this access.
Do
# grep /usr/bin/spamc /var/log/audit/audit.log | audit2allow -D -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:system_r:spamc_t:s0
Target Context                unconfined_u:system_r:postfix_master_t:s0
Target Objects                fifo_file [ fifo_file ]
Source                        spamc
Source Path                   /usr/bin/spamc
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           spamassassin-3.3.2-0.5.svn1071394.fc14
Target RPM Packages           
Policy RPM                    selinux-policy-3.9.7-37.fc14
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed)
                              2.6.35.11-83.fc14.i686 #1 SMP Mon Feb 7 07:04:18
                              UTC 2011 i686 i686
Alert Count                   9
First Seen                    Thu 24 Mar 2011 12:06:24 PM EDT
Last Seen                     Thu 24 Mar 2011 12:20:53 PM EDT
Local ID                      e6ff4887-a7e6-479f-856a-d03b038d97d7

Raw Audit Messages
type=AVC msg=audit(1300983653.708:744): avc:  denied  { read } for  pid=30127 comm="spamc" path="pipe:[573283]" dev=pipefs ino=573283 scontext=unconfined_u:system_r:spamc_t:s0 tcontext=unconfined_u:system_r:postfix_master_t:s0 tclass=fifo_file


type=AVC msg=audit(1300983653.708:744): avc:  denied  { write } for  pid=30127 comm="spamc" path="pipe:[573283]" dev=pipefs ino=573283 scontext=unconfined_u:system_r:spamc_t:s0 tcontext=unconfined_u:system_r:postfix_master_t:s0 tclass=fifo_file


type=SYSCALL msg=audit(1300983653.708:744): arch=i386 syscall=execve success=yes exit=0 a0=8fe7dd0 a1=8fea120 a2=8fea080 a3=3 items=0 ppid=30126 pid=30127 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=1 comm=spamc exe=/usr/bin/spamc subj=unconfined_u:system_r:spamc_t:s0 key=(null)

Hash: spamc,spamc_t,postfix_master_t,fifo_file,read

audit2allow

#============= spamc_t ==============
allow spamc_t postfix_master_t:fifo_file { read write };

audit2allow -R

#============= spamc_t ==============
allow spamc_t postfix_master_t:fifo_file { read write };