A client of our has a requirement to block all email from facebook except for specific users.
There doesnt seem to be a good way to do this without unfiltering other unwanted messages for these users. Unlike web filtering rules, there doesn't seem to be a way to build exceptions with an "and"...just an "or".
I can stick facebook.com in the sender blacklist, and then exclude users from that sender-blacklist. But the sender blacklist has many many more entries besides facebook that these users will want to block.
Any ideas? It would seem to be a simple function but I'm not seeing any way to do it.
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