SonicWall TZ-170 DNS, Exchange questions...

I recently installed an exchange (2003) server on our network. I have a Win2k AD Domain & am having a few problems getting mail to & from some users, but not all. I recently turned off forwarding on my DNS server & let it use the root hint servers, as I read that this can cause problems. I also see alot of entries in my sonicwall log like this: UDP packet from LAN dropped - 192.168.100.249, 53, LAN - 192.168.100.254,

3195, LAN - UDP Port: 3195 192.168.100.249 is my DNS Server & 192.168.100.254 is the SonicWall's address. The UDP port changes, however. I originally had port 53 open to & from a DNS server at my ISP. Should I change or add anything?
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M'Balz Es-Hari
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