i have taken over for a contractor at one of my companies locations. they were using groupwise 6.5 and netware 6.5 and they wanted to move to windows and exchange. so i migrated them to windows 2003 and exchange 2003. the setup is like follows: one domain controller with windows and exchange 2003 on it. they have a watchguard firewall. the internal domain is .local. everything on the domain controller is working fine and the way it should. i have found out that the location has been having their isp host their dns. which is fine. they are a .org. how do i properly setup exchange 2003 internally for this situation. i need exact details if possible. i am having off an on problems with exchange in my situation. some users are getting errors of not having permissions to send to certain recipients. on the domain controller i have dns running but i have the isp ip's in the forwarders. i do not have reverse lookup zones. do i need one??? can anyone tell me what i am missing and how to correct any mistakes. do i have to put anything specific in the internal dns since the dns of .org is hosted offsite for the location??