I have a server that I use for playing around with. I want to set up an email account that is @.com, but the way that SquirrelMail and the mail server is set up, the home folder for the username has to be stored in var/www/squirrelmail, instead of /home. Can I have two users named with different UID's, permissions, groups, etc? I assume that Ubuntu Server will let me, but I'm worried that there could be some side effects/ security flaws. Are there?