Okay MTP solved that problem! Thanks for that. laugh

Another item learned today.

When working behind an ASA (or PIX) the voicemail to email notification would not work. The ASA drops the packets since it doesn't have an interface for the 10.1.10.0/30 subnet.

To fix this issue. Add a static route on your mail server to point to the data side of the UC.

Here is my route:

route add 10.1.10.0 Mask 255.255.255.252 192.168.0.15 -p

Make sure you use the -p or it will get lost on reboot...

The 192.168.0.15 is my UC Data IP.

Hope this helps save someone a few hours of headaches!