Sendmail 'host name configuration error' message

[Bob Weissman]

I'm trying to set up a local area network with a MicroVax running
4.3bsd acting as the UUCP gateway to the world.

The MicroVax has taken over the name "acornrc" from the old Vax
11/750 running 4.2bsd, which is now an internal host called "stlvax".

acornrc is running smail, using the usual smail sendmail.cf.
stlvax is using the SMI sendmail.cf.subsidiary file and using ether
and SMTP to talk to acornrc.

When logged in to stlvax, If I try "mail acornrc!stlvax!bob",
I get returned mail from acornrc with a sendmail error message
  553 host name configuration error

Obviously, mail is flowing both ways enough to return an error!

What does this mean, and how do I fix it?

Thanks,
-- 
Bob Weissman
Internet:	bob at acornrc.uucp
UUCP:		...!{ ames | decwrl | oliveb | apple }!acornrc!bob
Arpanet:	bob%acornrc.uucp at ames.arc.nasa.gov