DNS/Bind Error Help under FBSD 6.2 using Sendmail..

[Mark Andrews]

> 
> I am seeing an issue with some eMail moving from the server here is one such
> example:
> 
> l25F3FJW082596    96337 Mon Mar  5 10:03 <bfondak at kpl.com>
>                  (Deferred: Name server: mail.jingmei.com.: host name lookup
> f)
>                                          <order_bj at jingmei.com>
>                                          <mlin at jingmei.com>
> 
> 
> OK, so I did a lookup of it's MX, and get: 
> 
> jingmei.com mail is handled by 10 mail.jingmei.com
> 
> 
> So then I looked up mail.jingmei.com:
> 
> mail.jingmei.com has address 220.112.41.223
> Host mail.jingmei.com not found: 2(SERVFAIL)
> 
> I see I am getting a returned IP address which can be connected to, but also 
> a
> SERVFAIL error.   
> 
> Now I am aware of the AAAA IPv6 issue, and have the needed setting in my
> sendmail.cf file:
> 
> O ResolverOptions=WorkAroundBrokenAAAA
> 
> So I would have hoped this would have worked around the issue and permitted
> mail flow, yet apparently not for some reason.
> 
> I have googled and looked around, and maybe just not found the right info yet
> ,
> but if anyone has any idea how to track this down, or resolve the issue it
> would sure be most appreciated.  
> 
> Most of my mail moves fine, but I have a couple domains I am guessing have
> something wrong, so I can't seem to get mail out to them...


	mail.jingmei.com is delegated to lp.jingmei.com.  lp.jingmei.com
	doesn't serve mail.jingmei.com for AAAA queries.  Note the
	SOA record is wrong here.

	lp.jingmei.com says there are no NS, SOA or just about any other
	records for mail.jingmei.com.  The AAAA queries appear to be
	going through to another box which is configured to serve
	jingmei.com not mail.jingmei.com.  I base this conclusion on
	the fact that there are different types of negative responses
	based on the query type and the flags differ.  Note that the
	authorative answer for the A query is not right either.  RD is
	not returned in the answer.

; <<>> DiG 9.3.3 <<>> mail.jingmei.com @lp.jingmei.com aaaa
; (2 servers found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29814
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;mail.jingmei.com.		IN	AAAA

;; AUTHORITY SECTION:
jingmei.com.		86400	IN	SOA	jingmei.com. administrator.jingmei.com. 998545544 28800 7200 604800 86400

;; Query time: 416 msec
;; SERVER: 203.86.7.130#53(203.86.7.130)
;; WHEN: Thu Mar  8 07:52:23 2007
;; MSG SIZE  rcvd: 120


; <<>> DiG 9.3.3 <<>> mail.jingmei.com @lp.jingmei.com a
; (2 servers found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35135
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;mail.jingmei.com.		IN	A

;; ANSWER SECTION:
mail.jingmei.com.	30	IN	A	220.112.41.223

;; Query time: 323 msec
;; SERVER: 220.112.41.194#53(220.112.41.194)
;; WHEN: Thu Mar  8 08:22:54 2007
;; MSG SIZE  rcvd: 50

> ---
> Howard 
> http://www.leadmon.net
> 
> 
> 
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-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org