My client sudden reported that he could not send and receive email.
Then I checked the postfix process is running and I try to telnet localhost 25 for a full smtp test and got the same problem on this comment I found so far http://www.virtualmin.com/node/21459#comment-96935
and I tried to stop and start postfix daemon and it stucked at Staring postfix. The I tried to reboot the server, the postfix could not start I listed daemon process with ps -ef
show somthing strange
root 2821 1539 0 21:38 ? 00:00:00 /bin/sh /etc/rc3.d/S80postfix start
root 2831 2821 0 21:38 ? 00:00:00 /bin/sh /usr/libexec/postfix/postfix-script start
root 2838 2831 0 21:38 ? 00:00:00 /bin/sh /usr/libexec/postfix/postfix-script check-fatal
postfix 2864 2838 0 21:38 ? 00:00:01 /usr/sbin/postsuper
and I from something error on maillog
host2 postfix/postfix-script: fatal: Postfix integrity check failed!