Postfix gives "fatal: the Postfix mail system is already running" message in /var/log/maillog

Solution Verified - Updated -

Issue

  • Postfix gives the following message in /var/log/maillog
postfix/postfix-script: fatal: the Postfix mail system is already running

What does this message mean, and is any action required regarding it?

Environment

Red Hat Enterprise Linux 5
Red Hat Enterprise Linux 6
Postfix

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