Postfix throwing an error, `fatal: unsupported dictionary type: #hash` in RHEL.

Solution Verified - Updated -

Issue

  • We are getting below errors on postfix:
smtp3 postfix/master[22740]: warning: /usr/libexec/postfix/smtpd: bad command startup -- throttling
smtp3 postfix/smtpd[27696]: fatal: unsupported dictionary type: #hash

Environment

  • Red Hat Enterprise Linux (RHEL) 5
  • Red Hat Enterprise Linux (RHEL) 6
  • postfix

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