I'm gonna run down a list of things. I've never used Roaming user support but so far everyone says it works. Gonna start with some simple troubleshooting because you haven't listed what you have and haven't done. 1. Simplify. Get rid of everything, all the rbl stuff Qmail-Scanner auth-smtpd, ditch it for now. First order of business is to make sure the basics work. Once the basics work you can add in stages from there. 2. Did you during configure of vpopmail --enable-roaming-users=y ? The FAQ has a typo of some sort it says to use the path to vpopmails home in tcpserver but later on it says that it updates the one in /etc. Simple test for that is to login via pop from a remote location and see if it updated either /etc/tcp.smtp.cdb or ~vpopmail/etc/tcp.smtp.cdb. Can also check for this file ~vpopmail/etc/open-smtp don't forget to run clearopensmtp once an hour atleast to flush the files. 3. To use Qmail-Scanner did you apply the qmail-queue patch to a clean Qmail 1.03 source tree? If you did the default install of qmail- scanner it should have debugging turned on and be creating a logfile in /var/spool/qmailscan. The file in there will tell you if it's scanning mail.
Phil