Subdomain mapping to domain

Posted by bobobobo on Server Fault See other posts from Server Fault or by bobobobo
Published on 2010-05-11T22:16:14Z Indexed on 2010/05/11 22:25 UTC
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Filed under:

dns

|

mx

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a-record

What happens if you have 2 DNS entries:

Name         |  Type |  Value
-------------+-------+--------------
example.com  |  A    |  20.20.20.20
example.com  |  MX   |  mail.example.com

Does this mean that smtp requests to example.com will map to 20.20.20.20, and somehow request in the headers mail.example.com? What?

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