The idea here is to run:
% ./check-aliases.sh
It checks the various alias files configured in
/etc/mail/sendmail.cf for
owner-
aliases which are misconfigured. All such aliases will be reported to
stdout. For each, it will either be noted as
OK
or a recommendation will be made for what it should point to. No output
means no
owner- aliases, so no problem.
Download the shell script.