I've tried searching for a long time, and everything seem to lead me nowhere. I'm using this guide: http://www.howtoforge.com/virtual-users-domains-postfix-courier-mysql-squirrelmail-ubuntu-10.04 which has worked WONDERFULLY, thank you very much, every single thing is working flawlessly except my mailbox quotas. I've read and reread the section on quotas, and did the section 3 "Apply The Quota Patch To Postfix" part. The funny thing is, I did it last week following the same tutorial, and it worked, but that was a proof of concept run for me and I used really weak passwords and settings, so I wanted to redo it and hopefully go live with it. The only difference is, I didn't install squirrel mail this time, I went straight to roundcube. I briefly reviewed the squirrel mail section, just to see if there were any items in that step that may pertain to the quotas, but I saw none I've looked at every postfix config file and I don't see anything anywhere that would create this issue. Unless there is a separate config file for this postfix vda that I did not see. Thanks for any help, I can't believe how comprehensive the writeups are here, truly amazing, hopefully this week we can have one less windows mail server in the world.