badmailto functionality ?

[James Morgenstein]

All-

Is there a way to block the delivery of messages through my smtp servers to
particular addresses?

I have qmail acting as a local relay sending mail from inside my network to
users on the outside.  The users that I want to block would be on the
outside, but the mail is sent from the inside.

I can use the badmailfrom control file to block mail from someone, but I am
looking to block mail to a list of people.

As always, thanks for the help.

James