[NTLUG:Discuss] Mail server not propagating?

[David Camm]

there's actually more to this than meets the eye. it turns out that only
one server can be authoritative for a domain. THIS server has the SOA
record, and it's the only server that should. that said, secondary,
tertiary, etc. don't mean that any more. the way it REALLY works (as i
discovered) is that the ROOT SERVERS rotate among ALL the dns servers
that are known for a given name in order to try to equalize traffic. so,
it's absolutely critical that when you change something it gets
propogated correctly.

as to the 'ratings' of MX records, they represent priority of delviery.
the lowest is tried first, and if delivery fails, progresses up the
chain to the next highest number. you will see things like:

MX 10, mail.xyz.com
MX 20, mail.abc.com

if a delvery cannot be made to mail.xyz, the MTA will ask again and then
try to deliver to mail.abc

david camm
advanced web systems

m m wrote:
> 
> >From: Bug Hunter <bughuntr at one.ctelcom.net>
> >Reply-To: discuss at ntlug.org
> >To: discuss at ntlug.org
> >Subject: Re: [NTLUG:Discuss] Mail server not propagating?
> >Date: Fri, 12 Jul 2002 14:58:24 -0500 (CDT)
> >
> >
> >   the first name server in the list is the master name server
> >   the second name server in the list is the secondary name server
> >   the third """" tertiary
> >   the fourth """" quatentary  (sp?)
> 
> domain aaaexample.com
> nameserver ns.nameserver_A.com (in TX)
> nameserver ns.nameserver_B.com (in NY)
> nameserver ns.nameserver_C.com (some where in the world)
> 
> nameserver ns.nameserver_A.com have SOA record of aaaexample.com like this:
> ns ns.nameservera_A.com
> ns ns.nameservera_B.com
> ns ns.nameservera_C.com
> 
> nameserver ns.nameserver_B.com have SOA record of aaaexample.com like this:
> ns ns.nameservera_B.com
> ns ns.nameservera_C.com
> ns ns.nameservera_A.com
> 
> nameserver ns.nameserver_C.com have SOA record of aaaexample.com like this:
> ns ns.nameservera_C.com
> ns ns.nameservera_A.com
> ns ns.nameservera_B.com
> 
> which nameserver is the master server of aaaexample.com?
> 
> if we can have only one master name server, then this domain will have
> problem to be "seen"?!
> 
> >
> >   basically, yes.  However, no book that I know of says this.  I found out
> >word of mouth.  I've read O'Reilly's bind book.
> 
> This is why I came here to ask. Cannot get answers from any books and
> existng googles site.
> 
> >
> >   Whereas, the MX records have a rating (10, 20, 100, etc). Go figure.
> >
> >bug
> >
> >
> >On Fri, 12 Jul 2002, m m wrote:
> >
> > > Thanks Brian.
> > >
> > > another questions:
> > >
> > > can a domain have only one master name server?
> > >
> > > what happen if there are two master name servers? should the soa rr need
> >to
> > > be identical?
> > >
> > > thanks.
> > >
> >
> >
> >_______________________________________________
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> 
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