SELinux is preventing /usr/sbin/sendmail.postfix from 'use' accesses on the fd /dev/null.

*****  Plugin catchall_boolean (80.5 confidence) suggests  *******************

If you want to allow all domains to use other domains file descriptors
Then you must tell SELinux about this by enabling the 'allow_domain_fd_use' boolean.
Do
setsebool -P allow_domain_fd_use 1

*****  Plugin leaks (10.5 confidence) suggests  ******************************

If you want to ignore sendmail.postfix trying to use access the null fd, 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/sbin/sendmail.postfix /var/log/audit/audit.log | audit2allow -D -M mypol
# semodule -i mypol.pp

*****  Plugin catchall (10.5 confidence) suggests  ***************************

If you believe that sendmail.postfix should be allowed use access on the null fd 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 sendmail /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                system_u:system_r:system_mail_t:s0-s0:c0.c1023
Target Context                system_u:system_r:init_t:s0
Target Objects                /dev/null [ fd ]
Source                        sendmail
Source Path                   /usr/sbin/sendmail.postfix
Port                          <Inconnu>
Host                          (removed)
Source RPM Packages           postfix-2.8.3-1.fc16
Target RPM Packages           
Policy RPM                    selinux-policy-3.9.16-28.fc16
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed) 3.0-0.rc3.git0.3.fc16.x86_64 #1
                              SMP Tue Jun 14 17:13:27 UTC 2011 x86_64 x86_64
Alert Count                   1
First Seen                    mer. 15 juin 2011 22:15:04 CEST
Last Seen                     mer. 15 juin 2011 22:15:04 CEST
Local ID                      bb2905da-4a6a-44bb-ba89-44a16b02fcdf

Raw Audit Messages
type=AVC msg=audit(1308168904.535:308): avc:  denied  { use } for  pid=6459 comm="sendmail" path="/dev/null" dev=devtmpfs ino=5052 scontext=system_u:system_r:system_mail_t:s0-s0:c0.c1023 tcontext=system_u:system_r:init_t:s0 tclass=fd


type=SYSCALL msg=audit(1308168904.535:308): arch=x86_64 syscall=execve success=yes exit=0 a0=7fff1e1dce60 a1=7fff1e1d9c60 a2=7fff1e21d560 a3=0 items=0 ppid=6434 pid=6459 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=12 comm=sendmail exe=/usr/sbin/sendmail.postfix subj=system_u:system_r:system_mail_t:s0-s0:c0.c1023 key=(null)

Hash: sendmail,system_mail_t,init_t,fd,use

audit2allow

#============= system_mail_t ==============
#!!!! This avc can be allowed using the boolean 'allow_domain_fd_use'

allow system_mail_t init_t:fd use;

audit2allow -R

#============= system_mail_t ==============
#!!!! This avc can be allowed using the boolean 'allow_domain_fd_use'

allow system_mail_t init_t:fd use;

Another strange AVC