Frequently Asked Questions: 1) Why isn't PostfixAdmin creating my mailbox? - PostfixAdmin is only a web interface for storing configuration settings. It does not (by default!) have the ability to create mail folders on disk. In a normal setup, sending the 'Welcome' email accomplishes this task - as Courier/Cyrus/etc do it (and have permission to do so) 2) I've deleted the mailbox from PostfixAdmin, yet it still exists on disk? Why? - This is related to #1 above - namely, PostfixAdmin (which is a php web application) does not have permission to modify the mailbox files on disk. You need to either manually remove the directories (e.g. rm -Rf /var/spool/mail/vmail/something@example.org) or install the postfixadmin-mailbox-postdeletion.sh script (See ADDITIONS/) and modify config.inc.php appropriately.