Need help bad with dns and smtp mail

[Barry Margolin]

In article <s19hcuapgbb12 at corp.supernews.com>,
Colin Reinhardt <colinrei at oz.net> wrote:
>I hope this isn't the wrong place to post this, but I feel I must now seek
>the DNS gurus and SMTP administrators and this is where I presume you'll be.
>Please excuse me if my post is inappropriate, here goes...
>
>I have been struggling with a DNS and named SMTP mail configuration now for
>several weeks.
>My platform is Linux Slackware 2.2.6 and BIND 8.x (I believe).
>I have been through DNS & BIND (cricket liu...) and the DNS HOWTOs to no
>avail.
>
>This issue is related to MX records and mail delivery. ( which is why I
>cc'ed comp.mail.sendmail... )
>I'm getting the error "451 - <colinrei at edgewaterhotel.com> ...
>edgewaterhotel.com: Name server timeout"
>named is up and running, and seems to be resolving correctly per my NSLOOKUP
>tests.

I'm not sure if it would cause this symptom, but your secondary server
dns2.nhresorts.com, is refusing to answer queries about your domain:

; <<>> DiG 2.2 <<>> edgewaterhotel.com mx @dns2.nhresorts.com +norecurse 
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 10
;; flags: qr aa ra; Ques: 1, Ans: 0, Auth: 0, Addit: 0
;; QUESTIONS:
;;	edgewaterhotel.com, type = MX, class = IN

>What is odd is, inbound mail is delivered successfully from several remote
>SMTP servers (including Hotmail, @home, etc...), but on others it will fail
>with the above error NDR.  Outbound mail works fine.

If it's always the same sites that have trouble, there may be a routing
problem between their DNS servers and yours.  And since the secondary
server isn't responding, there's no backup when this happens.

-- 
Barry Margolin, barmar at bbnplanet.com
GTE Internetworking, Powered by BBN, Burlington, MA
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