We are beginning to use our Zimbra installation to server multiple clients (domains). This weekend I plan to upgrade to 4.5.4 and would like to be able to send an email to all account holders in all hosted domains to let them know.
Does anyone have an approach for doing this or is there something builtin for this?
I am thinking that it will involve the GAL of the hosting domain including the GAL's of the other domains but I am not sure how to easily accomplish this.
thanks in advance