We have been using X-Mail as our server for the last year or so and have been pretty happy with it except for one serious problem......spam. So we have changed over to Zimbra in hopes of better filtering and control. We allowed a few select staff members to make mailing lists that allowed for a single administrator for control as to who could send with it, or make modifications. Basically a private list. Can anyone give me any info on how to duplicate this feature and what additional software may be needed.