# grep dump messages
May 10 23:53:38 mail savecore: no core dump (no dumpdev)
May 11 16:14:47 mail savecore: no core dump (no dumpdev)
May 11 21:49:22 mail savecore: no core dump (no dumpdev)
# grep dump /etc/rc.conf 
dumpdev="auto"
dumpdir="/usr/dump"