Exchange mail setting and Firewall exchange help

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I have a new Exchange 2010 install on a new server and I think I have everything setup other than DNS records and I'm not sure if my Firewall rules are correct on a Sonic Wall NSA 3500. We currently use a free hosting service for our email system hosted online with our domain name along with our website. I want to leave our website with this host but move the mail records to this new server I have setup ,but I don't know how I should go about that or what name I need to change the records to in order to work correctly.

Skills required:
DNS, Microsoft Exchange
About the employer:
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