On Tue, Apr 11, 2006, enediel gonzalez wrote: > I have exim4 installed on a debian box, this installation is the smarthost
> for a domain hosted by a mailer on the internal network. I know all the
> valid accounts for this domain, and I need to filter emails with invalid
> account destination to it.
create a verify_only redirect router which looks up addresses from a
database (flat files will do) and returns :fail: if it's unknown, null
otherwise.