https://forums.freebsd.org/threads/sendmail-8-15-2-map-named-virtuser-not-open.54706/
Solved - Sendmail 8.15.2 - Map named "virtuser" not open | The FreeBSD Forums
I'm trying to get sendmail to receive email for any username at my domain. When mail is sent to the email address matching the owning username, e.g...