Configuring DNS & MX records for exchange 2010

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http://serverfault.com – i am trying to configure Exchange Server 2010 on Windows Server 2008 R2 to receive emails from the internet following the danscourses tutorials: and i followed this video for the DNS & MX records: http://www.youtube.com/watch?v=jdf_3DRssks i don't have any windows administration skills, and i am stuck with the DNS configuration. and the following are my domain configuration i got from the hosting. following are the steps i made: 1- Add new name server: add > ns1.centors.com ip > Exchange Server Public IP: 2- Change the A record change it to point to the public ip ad (HowTos)