We have a secondary mail domain that is all retail stores.
The mail template for this domain had been modified to block sending of messages to several "global" groups. Over the last year this has expanded to 19 groups.
This works fine.
Now they want to only allow the stores to mail certain groups (about 20) - ALL other groups (in both domains) should be blocked (only groups not individuals). Adding hundreds of groups to a list and maintaining it (as more are created) certainly does not seem like the best way to do this.
Does anyone have any suggestions on how this could be accomplished with the least amount of ongoing maintenance? Server Rules? AV-filtering third party product? Template modifications?
Thank in advance.
Feedback number PHAS7XBLD7 created by Peter Haynes on 10/30/2009