Mailman failed to deliver a message to mailman-loop alias due to Permission denied error.

Solution Unverified - Updated -

Issue

  • Mailman detected bounce loop and tried to send a message to the mailman-loop alias.
  • But it failed with below Permission denied error.

    warning: unable to create lock file /var/lib/mailman/data/owner-bounces.mbox.lock: Permission denied
    status=bounced (cannot append message to file /var/lib/mailman/data/owner-bounces.mbox: cannot create file exclusively: Permission denied)
    

Environment

  • Red Hat Enterprise Linux 7
  • mailman
  • postfix

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