I've been searching for a while, and haven't found specifically what I'm looking for. Basically, we have a need whereby a specific group of users should only be able to login to their accounts from within the office, and they should only be able to send to specific domains and receive mail from specific domains.
Prior to Zimbra, this was achieved by using 2 separate mail servers. The internal mail server was configured to only be able to send and receive mail within its own domain as well as to\from the second mail domain. The second mail server was configured to send mail normally, and had the ability to also send to the internal mail domain. The internal mail servers webmail site was also only accessible internally.
Now that we have migrated our primary mail server to Zimbra, rather than create a second Zimbra server for the internal mail, we'd like to be able to maintain just the single Zimbra server, but have control over who can send where, and where they can login from.
I was able to find some information on controlling what domain's a user can send mail to, however, I still can't find anything on controlling where they can login from.
Thanks in advance!