lefgifu with: sendmail access TO
http://www.feep.net/sendmail/tutorial/anti-spam/access_db.html
'The left hand side of each entry can optionally be prefixed with one of the tags To:, From:, or Connect:.'
Yes, I have tried this. I have entries like this in my access file:
To:staffing@unwantedcompany.com DISCARD
Yet mail to staffing@unwantedcompany.com goes through just fine. I think I may be missing something here.