Email filters, blacklist ALL

Hi folks. Dumb question here but what’s the best way under Dreamhost to black list ALL mail to a specific email address except the addresses I specify that can send to it?

I’ve not tried this, but I’d attempt to use Whitelisting and a VERY low spam threshold.

Log into your webmail and click on Options (or, then SpamAssassin. Add the desired email address(es) to your Whitelist, and set the Spam threshold to 0 and 0.

What I’m hoping is that your whitelisted addresses will get through and everything else will get dumped to your spam mailbox.