I just found Untangled and have been testing it out with a new network I'm building... I love it for the 36 hours I've used it, but today I ran into a problem that might be a show-stopper.
The network looks like this:
WAN --> Untangled Box --> LAN SWITCH --> Exchange 2010 Server
Exchange is accepting e-mail and Untangled is forwarding e-mail to it as expected... EXCEPT if it's been quarantine. Once it hits the quarantine, even when I release it, it is never delivered. I saw the FAQ about the untangled server's e-mail address needing to be added to the safe list - so I did that. Then tested another account and message... NOTHING. So I tested the e-mail functionality under Config --> Email --> Test Email. This failed when sent to my exchange server. When sent to another server outside the network, it worked fine.
For good measure, I then tested the digest request web page... and never received a digest either (even though I was supposed to have since e-mail for that address has been quarantine).
Any insight/help much appreciated...