Does Zimbra support mailing lists? Our old system has something like a distribution group, a set of emails of people have subscribed to our mailing list. Users who generate the monthly newsletter the simply put the group into the "To:" field, and away it goes.
The critical part is that when the recipient gets the mail, it does not contain the email addresses of other members of the mailing list. A distribution list is just a short-cut - it will show the addresses of the other recipients.
Does Zimbra allow you to mail a group of people in the "To:" field WITHOUT all email addresses being displayed?