The -o option means "optional". -Matthew > Sendmail-8.12.6 > config.mc: FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable')dnl > sendmail.cf: Kvirtuser hash -o /etc/mail/virtusertable > > Sendmail doesn't even complain when there is no > /etc/mail/virtusertable(.db).