Can't send mail with mail firstname.lastname@example.org
looked in /var/log/maillog and I see thousands of these....
Mar 14 07:46:42 server-01 postfix/smtp: fatal: open lock file pid/unix.smtp: file has 2 hard links
Mar 14 07:46:43 server-01 postfix/master: warning: process /usr/libexec/postfix/smtp pid 9168 exit status 1
Mar 14 07:46:43 server-01 postfix/master: warning: /usr/libexec/postfix/smtp: bad command startup -- throttling
Server is RHEL 6. Five others in this cluster work fine.... so not sure what happened here. I didn't really configure them any differently.