We use a few shell scripts invoked from a crontab to distribute our
configs to a set of servers. I thought it might be a good idea to run a
"postfix check" within the scripts at the end of the process so it would
readily apparent if we had distributed a change which broke things. E.g.

  postfix/postfix-script: warning: not owned by root: /etc/postfix

However it seems that, aside from the logfile, the check option only
writes warnings and errors to a tty type of device, so contructs like 2>&1
don't work if the command is invoked from within a sh script. Does anyone
have any ideas how to duplicate this output on stdout when "postfix check"
is not run from tty? Or is there some other approach I should try to
achieve the desired effect?

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