By default, all popstore accounts for a given installation share the same name space. This means that if the two distinct e-mail addresses sandy@example.com and sandy@example.org are directed to the same popstore, then e-mail to either of these addresses will be delivered to the same user account sandy. At some sites, however, it is useful to have distinct communities of users, each with their own name spaces. This is achieved with the popstore² through the use of "user domains". Please see Section 1.3.5 for a basic discussion of popstore user domains. This section focuses on the mechanics of creating and managing user domains and assumes knowledge of the material presented in Section 1.3.5.

Note that all e-mail messages for all user domains are co-mingled in the same directory tree. That is, messages for one user domain are not stored distinct from other user domains.

6.13.1 Enabling user domains