Problem with Recursive Queries

[Mark Andrews]

> I have set up some control to restrict recursive queries to my DNS
> server and found that somehow it affected the delivery and sending of
> emails.
> 
> Following are entries that I put in the named.conf file to restrict
> recursive queries.
> 
> view "internal" {
> match-clients { 192.168.100.0/24; };
> recursion yes;
> };
> view "external" {
> match-clients { any; };
> recursion no;
> 
> The error message i got from sending mail is :
> 
> bodytype=8BITMIME, proto=ESMTP, daemon=MTA, relay=[203.223.137.123]
> Mar  7 18:29:08 abs-mail sendmail[1947]: [ID 801593 mail.notice]
> k27AEIak001947: ruleset=check_mail, arg1=<bgifwkul at bgi.com.my>,
> relay=[203.223.137.123], reject=451
>  4.1.8 Domain of sender address bgifwkul at bgi.com.my does not resolve
> 
> Can anyone help to see why this is so.
> 
> Rgds/
> 
> 
> KS Tan

	Lookups are failing because the answers are not authoritative

; <<>> DiG 8.3 <<>> mx bgi.com.my @203.92.157.2 +norec 
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2962
;; flags: qr ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 2
;; QUERY SECTION:
;;	bgi.com.my, type = MX, class = IN

;; ANSWER SECTION:
bgi.com.my.		6H IN MX	5 smtp2.bgi.com.my.
bgi.com.my.		6H IN MX	10 smtp.bgi.com.my.
bgi.com.my.		6H IN MX	10 mail.dev.

;; ADDITIONAL SECTION:
smtp2.bgi.com.my.	6H IN A		219.94.51.182
smtp.bgi.com.my.	6H IN A		203.92.157.6

;; Total query time: 382 msec
;; FROM: drugs.dv.isc.org to SERVER: 203.92.157.2
;; WHEN: Wed Mar  8 14:37:20 2006
;; MSG SIZE  sent: 28  rcvd: 127
	

; <<>> DiG 8.3 <<>> mx bgi.com.my @219.94.51.179 +norec 
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29114
;; flags: qr ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 2
;; QUERY SECTION:
;;	bgi.com.my, type = MX, class = IN

;; ANSWER SECTION:
bgi.com.my.		6H IN MX	5 smtp2.bgi.com.my.
bgi.com.my.		6H IN MX	10 smtp.bgi.com.my.
bgi.com.my.		6H IN MX	10 mail.dev.

;; ADDITIONAL SECTION:
smtp2.bgi.com.my.	6H IN A		219.94.51.182
smtp.bgi.com.my.	6H IN A		203.92.157.6

;; Total query time: 409 msec
;; FROM: drugs.dv.isc.org to SERVER: 219.94.51.179
;; WHEN: Wed Mar  8 14:38:15 2006
;; MSG SIZE  sent: 28  rcvd: 127

	and 210.187.36.130 does not respond.

	Mark
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org