I ahve tried this with 4.8.7 as well as 4.9 and can't seem to get it to work. I want to enable BOTH mysql and cdb authentication so I can gradually move my domains over from cdb to mysql. Can this be done? If you say yes, then what do I need to do? I only ask this question as I have tried this a half dozen times on our existing qmail+vpopmail server and it does not work. Once installed, I get these errors in /var/log/maillog: Sep 5 17:31:29 voyager vpopmail[4402]: vchkpw: No virt found [EMAIL PROTECTED]:207.206.15.107 No matter who tries to pop thier mail, a cdb based domain or a mysql based domain. My installation of qmail is very close to that in the LWQ faq. It has worked fine for the past 9 months, and have no complaints. I just want to migrate to mysql authentication. I would appreciate some help.