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You need to create A record and MX record for this (mail exchange).
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You need to create A record and MX record for this (mail exchange).

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For details about CNAME, use the following<br />
<a href="http://en.wikipedia.org/wiki/CNAME_record" rel="ugc">http://en.wikipedia.org/wiki/CNAME_record</a>
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For details about CNAME, use the following
http://en.wikipedia.org/wiki/CNAME_record [http://en.wikipedia.org/wiki/CNAME_record]

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When do you use an A name vs. a C name? <br />
<br />
For instance, I want to forward webmail.domain.com to a different ip than domain.com. Do I create a new A Name record to do this or a new C Name record in DNS to accomplish this?<br />
<br />
Thanks.
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When do you use an A name vs. a C name? 

For instance, I want to forward webmail.domain.com to a different ip than domain.com. Do I create a new A Name record to do this or a new C Name record in DNS to accomplish this?

Thanks.

when to use an a name vs. a c name?

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.