>>>>> "Jon" == Jon Peatfield <J.S.Peatfield@???> writes:
Jon> If your local mail is not qualified by an @domain, then you really want to
Jon> test for:
Jon> $header_to contains $local_part([~@]|@$domain) and ...
I think this could be a pretty good default setting that would work
in both environments where domain names are always used and where they
are not. (I don't know the correct syntax for exim's flavor of
regexp).