[K12OSN] How do I route mail to unknown users to one account

[Gary Frederick]

Howdy

I added this line to /etc/mail/sendmail.mc

define(`LUSER_RELAY',`local:auser at jsoft.com')

and did this

m4 sendmail.mc >sendmail.cf
service sendmail restart

I can send email to auser but email to unknown users still goes to me
rather than auser?

What did I do wrong?

Gary

This is on a k12ltsp system running sendmail.