General hostname domain email question.

Discussion in 'Server Operation' started by stefanos, May 5, 2009.

  1. stefanos

    stefanos Member

    Hi,

    I set up a perfect server with Debian Lenny.
    I am a bit confused about domain names and emails and I would like some clarification.

    Say I own a domain name called corenet.com
    The A & MX records all point to my IP

    I have called my server with a host 'dragon'.
    and thus the hostname for the server is dragon.corenet.com

    If I understand an email would be linked to a hostname.
    i.e. an actual email should look like: [email protected]

    So if I were to send an email to '[email protected]' it should be delivered to the user's account 'stephen' on dragon.

    But what happens if I want to send an email from the outside world to [email protected] and it be delivered to '[email protected]' does this work in a similar way to apache's ServerAlias? And how would you configure this is courier?

    Should corenet.com & dragon.corenet.com both resolve from the outside world to the same server IP or should dragon.corenet.com resolve internally on my LAN only and the default for *.corenet.com resolve to the server's IP?

    And what should I actually use for 'System mail name'?
    1) dragon.corenet.com or
    2) corenet.com

    Does anyone know of a good tutorial on server host naming?

    *Domain name has been changed*

    If I am a bit confusing I can try and clarify but it's all Greek to me.

    Kind Regards
    Stephen
     
    stefanos, May 5, 2009
    #1
  2. topdog

    topdog Active Member

    Mail is routed by means of an MX record, you do not need to point the domain name to a host ip. You need to create an MX record that points to your mail server(s)
     
    topdog, May 5, 2009
    #2
  3. stefanos

    stefanos Member

    hi topdog,

    Sorry my server died on me. Got the following error:
    (98)Address already in use: make_sock: could not bind to address [::]:80
    no listening sockets available, shutting down
    Unable to open logs

    I tried everything apt-get purge... reinstalling and nothing so I am going to format and install from scratch. I had in in my mind to do it at some point but I guess now is as good a time as any.

    As for the mail server name I think it's best to use the hostname (FQDN) of the server but this raises an issue if your server (via perl) sends an email to clients.

    I will need to look into this after the server is back up.

    Thanks
    Stephen
     
    stefanos, May 7, 2009
    #3

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