Re: [cobalt-users] Possible MX problem? RaQ3

[Jeff Lasman <jblists@xxxxxxxxxxxxx>]

Dan Kriwitsky wrote:

> You have a DNS issue someplace.

If you call a DNS server running wildcard DNS, then definitely <wry
grin>.  That's creating the confusing error messsage.

For example:

> [admin admin]$ nslookup millenium-online.com
> Server:  alpha.ez-access.com
> Address:  207.86.87.76
> 
> Name:    millenium-online.com
> Address:  216.234.186.162
> 
> [admin admin]$ nslookup jlasman.millenium-online.com
> Server:  alpha.ez-access.com
> Address:  207.86.87.76
> 
> Name:    jlasman.millenium-online.com
> Address:  216.234.186.162

Gee... he even has a subdomain registered for me <wry grin>.  Definitely
wildcard DNS and a great reason to NOT run it.

He couldn't create an error in the stanford.edu zone, could he?

More likely stanford has problem.

> --- verify e-mail "user1@xxxxxxxxxxxxxxxxxxxxx"
> --- looking up mailexchange for sherlock.stanford.edu
> --- unable to find mailexchange, contacting sherlock.stanford.edu
> --- error: Host not found

There isn't a host named sherlock.stanford.edu:

> [admin admin]$ nslookup sherlock.stanford.edu
> Server:  alpha.ez-access.com
> Address:  207.86.87.76
> 
> *** alpha.ez-access.com can't find sherlock.stanford.edu: Non-existent host/doma
> in
> [admin admin]$

So he's getting the email back.

The funny error message is a wildcard-DNS problem, that's all the local
DNS configuration involvement.

I obviously sent my previous reply too quickly, without serious
checking.

Jeff
-- 
Jeff Lasman <jblists@xxxxxxxxxxxxx>
Linux and Cobalt/Sun/RaQ Consulting
nobaloney.net
P. O. Box 52672, Riverside, CA  92517
voice: (909) 787-8589  *  fax: (909) 782-0205