HA! HA! Maybe you should register the pompous-___.net domain.
-----Original Message-----
From: cobalt-users-admin@xxxxxxxxxxxxxxx
[mailto:cobalt-users-admin@xxxxxxxxxxxxxxx]On Behalf Of Jeff Lasman
Sent: Wednesday, January 26, 2000 9:11 PM
To: cobalt-users@xxxxxxxxxxxxxxx
Subject: Re: [cobalt-users] RAQ2 DNS problem - Sendmail?
At 01:56 PM 1/26/00 WayneB6094@xxxxxxx wrote:
> > Presuming a domain name of <www.domain.com>, I create an A record for
> > <mail.domain.com> (with the main IP# for the box on which I'm receiving
> > email), and an MX record pointing <domain.com> to <mail.domain.com>
with
>a
> > precdence of 10.
> >
> > That gives me modularity and scalability.
> >
>
>Those are nice buzzwords, but what functionality does it provide, that you
>couldn't get another way?
You can do it any way you want; I never said you couldn't. I explained
what I did, and why. I really forget that most of the people on this list
neither are experienced systems administrators nor want to learn to
be. For that I apologize.
(And lest you think the above to be meant in some way demeaning, it
isn't. For example, I am neither an auto mechanic, nor do I want to be,
but I want my car to run when I need it.)
Okay: I create an A record pointing to <mail.domain.com> because that
creates a virtual machine called <mail.domain.com>. I can point it to any
IP# I want. I point it to the main IP# for the box on which I receive
email because the main IP# is least likely to ever be deleted, changed, or
pointed to another machine, therefore it's most likely to give me a
supportable environment forever.
I create an MX record pointing to that A record because some MTAs (Mail
Transport Agents) won't send mail to mail-servers defined in CNAME records
or PTR records.
And the reason I define a virtual machine to begin with is so that as I
grow larger or smaller I can point this virtual machine (by changing the
IP# in its A record) to any other virtual or real machine. One point of
change. That equals modularity and scalability.
Being in the DNS hosting business (ns-one.net) and the email-business
(emailwholesale.com) I'm often called in to "fix" dns records so mail will
work properly for complex domains. Some of the stuff out there is very
hard to follow, very hard to understand. The steps I've defined above
leave an easy-to-understand "audit" trail, if you will, that you can follow
and readily change as your growth dictates.
Jeff
--
Jeff Lasman, nobaloney.net
<jblists@xxxxxxxxxxxxx>
<www.nobaloney.net>, <www.mailtraqna.com>, <www.email-lists.com>
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