EMAIL DOMAINS?

Posted on 01. Aug, 2010 by admin in Cheap Hosting

I’m disagreeable to amount discover this abstract for my dads company. Their website is settled with the webhost valueweb. They hit their domain finished networksolutions. Yet, their telecommunicate is hosted on their possess computer at their workplace, not on the webhost or domain registar. I’m disagreeable to amount discover if i modify the web host and update the dns, module their telecommunicate go down? This is meet rattling unclear me how the domain points both to the website and their telecommunicate server. Thanks for your help, compassionate if i’m existence confusing.

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2 Responses to “EMAIL DOMAINS?”

  1. bostonianinmo

    01. Aug, 2010

    There’s an MX record in DNS that points to the FQDN of the mail server at his workplace. That FQDN has an A record that points to the external IP address of the mail server. That ensures that mail flows there.

    There’s an A record for the web server that points to valueweb’s servers and valueweb uses header inspection to route any incoming sessions to the correct virtual server on their system. The website itself is probably no more than a folder on a server that hosts dozens of websites. That folder is mapped to the virtual server so that incoming requests are properly routed.

    If you’re going to change the web hosting company, just update the A record for the website (probably the “www” hostname on the domain) and leave the MX record alone and all will be well.

  2. Jimbo

    01. Aug, 2010

    For those challenged by the acronyms…

    “DNS” stands for “Domain Name System”
    “MX” stands for “Mail Exchanger”.
    “A” stands for “Address”

    “FQDN” stands for “Fully Qualified Domain Name” which really means a complete domain name like “www.apple.com”.

    The DNS is responsible for converting FQDNs into IP addresses and mail-exchange records (it does other stuff too.)

    When you ask the DNS for the “A” record for http://www.apple.com, you get an IP address back for the host http://www.apple.com. When you ask the DNS for the “MX” record for “apple.com”, you get back the IP address for the mail server that services apple.com.

    The DNS isn’t a centralized database. It’s distributed throughout the network. For example, Apple’s DNS server handles all requests for hosts living at Apple. The “.com” server refers anybody looking for apple related stuff to Apple’s DNS server. How this all hooks together is a little complicated for this answer.

    Suffice it to say that if you change the “A” record for your website, it won’t change the “MX” record for mail.