Just an FYI... While poking around with everything else I discovered that email to www-data on frontend was collecting in /var/mail/www-data on frontend for the past many years. This is where error messages from cron and mail errors are being reported.
I have added an alias for www-data to root so that they will be visible along with all of the other root email. I read the root email from all of the systems daily and can react to problems reported there. Bob
