> > For well known names that are not related to specific protocols, only
> > the organization's top level domain name are required to be valid.
> > For example, if an Internet service provider's domain name is
> > COMPANY.COM, then the <ABUSE@xxxxxxxxxxx> address must be valid and
> > supported, even though the customers whose activity generates
> > complaints use hosts with more specific domain names like
> > SHELL1.COMPANY.COM. Note, however, that it is valid and encouraged
> > to support mailbox names for sub-domains, as appropriate.
>
>
Except, IMO, cobalt.com is not an ISP, which I think, is what that's
designed for.