Configure your primary domain to enable the email archival setting for all/required users. On configuration, email messages sent/received by those users are archived on the Vaultastic server.
To enable email archiving for MDaemon users, you need to configure a mail route for Vaultastic server. This mail route is an integral part of the MDaemon email archiving setup, and will be used to route mail from MDaemon to Vaultastic.
To archive mail from your primary email domain hosted on MDaemon, the journal feature of MDaemon is used. The journaling feature forwards mail from the primary email server to the Vaultastic servers to enable email archiving for MDaemon.