Re: DNS 'A' query for a single dot

10 msg	Master <--> slave named.conf 'auto-genera...
1 msg	Recursive and non-recursive
5 msg	Anyone still interested in Philip Hazel's 'make...
2 msg	How can I find out who is my domain name server...
2 msg	How to configure a dns server without internet ...
9 msg	network tools
7 msg	Why are only com/net/org slow?
13 msg	bad horizontal referral ?
3 msg	Limit queries per IP address.
6 msg	Is NSEC case sensitive while being signed?
4 msg	getting CNAME to work for www.domain.com equals...
5 msg	named selectively denies recursion

DNS 'A' query for a single dot
\ Mark (11 Mar 2008)
. \ Kevin Darcy (11 Mar 2008)
. \ Barry Margolin (11 Mar 2008)
. . \ Stephane Bortzmeyer (11 Mar 2008)
. . \ Chris Thompson (11 Mar 2008)
. . \ Justin Pryzby (13 Mar 2008)
. . \ Justin Pryzby (13 Mar 2008)
. \ Mark Andrews (11 Mar 2008)

2 msg	configure: error: BIND 9 libraries must be inst...
1 msg	multiple ips per name server
3 msg	Is 'domain' a valid directive ?
2 msg	Doublt about DNS Client...
2 msg	how do overlapping views work in bind?
6 msg	Transferring of zones that use view.
9 msg	Bind9 - Reverse net /20 mask 255.255.240.0

Subject:	Re: DNS 'A' query for a single dot
Group:	Bind-users
From:	Justin Pryzby
Date:	13 Mar 2008

On Tue, Mar 11, 2008 at 12:10:15AM -0400, Barry Margolin wrote:
> In article <fr4vdl$2c7l$1>, Mark <anonymoususr> wrote:
> >
> > Does anybody knows what an "A" query for a dot (".") means?

> I think there are a number of domains that have MX records pointing to
> the root, as a convention to prevent mail from being sent to the domain.
AFAICT it was a failed proposal by yahoo,
http://www.potaroo.net/ietf/idref/draft-delany-nullmx/
smtp105.sbc.mail.mud.yahoo.com mail is handled by 0 .

The A query might be an email-related tool doing a somewhat-naive
lookup.

Justin