Hello,
my CentOS 6.2 server sends the daily messages correct e.g. today at Feb 1 03:31:14
At the beginning of work hours (9:00 am local time):
Feb 1 10:06:17 server postfix/sendmail[27125]: fatal: chdir /var/spool/postfix: Permission denied
Solution: restorecon -R /var/spool/postfix/
Afterwards, postfix is OK again.
My own cron jobs will be run latest 1 am
What daily cron job destroys the selinux permissions?