Configure sendmail to reject mail for unknown users?

[Paul Howarth]

On Mon, 2006-03-13 at 17:42 -0800, Tim Alberts wrote:
> Les Mikesell wrote ..
> > If the server isn't set up to relay to a hub machine or
> > forward via mailertable, then it should automatically
> > reject any address that is not a local account.  Maybe
> > you have PostmasterCopy enabled.  Look in sendmail.cf
> > to be sure that 
> > #O PostmasterCopy=Postmaster
> > has the leading # to comment it out.  I've forgotten the
> > sendmail.mc invocation that would enable it but these
> > days you probably don't want it on.
> > 
> > Virtusers is mostly useful if you forward or accept for more
> > than one domain or wish to appear to.
> 
> That line is commented (#).

Can you post what you've actually got in your sendmail.mc file and the
full headers of one of the problem emails?

Paul.