You can find it at
Recommended http://www.shupp.org/ with the qmail-toaster-0.50 patch Original Patch at http://www.interazioni.it/qmail/#qmail-smtpd
Please take note: If you use TLS you will need an additional patch to fix an early close problem. The patch is listed on Tonix's page, the Original Patch link.
Thanks again Tonix!