Problems with Mail to erdoc.org

[Barry Margolin]

In article <c2pq1g$p3q$1 at sf1.isc.org>,
 Barry Finkel <b19141 at achilles.ctd.anl.gov> wrote:

> I have a problem sending mail to a domain
> 
>      erdoc.org
> 
> After lots of DNS queries, I think I have found the problem.
> The .org servers 
> 
>      tld[12].ultradns.org
> 
> list the nameservers for erdoc.org as
> 
>      dns[12].firehousehosting.net
> 
> BUT the real nameservers for that domain are
> 
>      ns[12].firehousehosting.net     (without the initial "d")
> 
> What I can not understand is this - when I query
> 
>      dig erdoc.org MX
> 
> sometimes I get SERVFAIL:
....
> and sometimes I get an answer:
....
> I would have expected SERVFAIL each time.  Can someone explain what
> is happening?  I sent mail to firehousehosting.net, and they said

I think the reason is that the firehousehosting.net domain has the same 
inconsistency between the delegation records and the NS records on the 
authoritative servers.  The problem is that there are no glue records 
for the ns[12].firehousehosting.net hostnames.

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***