these are the flags to pass to the
.Xr sendmail 8
daemon.
.It Ar savecore_enable
(bool) If set to
.Ar YES
then save kernel crashdumps for debugging purposes when the system
comes back up after a crash. Crash images are typically stored in the
.Pa /var/crash
directory.
.It Ar dumpdev
(str) If not set to
.Ar NO