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Re: [Old box, Newbie] Undelivered Mail Returned to Sender

From: Paul Rogers (paulgrogersyahoo.com)
Date: Thu Dec 13 2007 - 13:43:38 CST

--- Victor Duchovni <Victor.DuchovniMorganStanley.com> wrote:
> (missing) firewall. Please report:
> # dig +noall +ans -t mx yahoo.com
> # su nobody -c 'dig +noall +ans -t mx yahoo.com'
>
> If none return the expected MX records: toy DNS
> If only root sees MX records: config file permission issues
> In both see MX records: run "smtp -v -v" to log detailed DNS lookups.
>

Prefix: I remember reading a recommendation to use bind-9.x, didn't
like
bind-8.x, liked RedHat's resolver even less. I've got
libresolv-2.1.2.so
from RHL-6.1 & kinda doubt a compatible rpm for bind-9 is available at
this late date.

This was as nobody, got an error that noall was invalid, man page had
answer but not ans, and root's was identical except for the expiration
time seconds.
; <<>> DiG 8.2 <<>> +noall +answer -t yahoo.com
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26600
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 7, ADDITIONAL: 7
;; QUERY SECTION:
;; yahoo.com, type = MX, class = IN

;; AUTHORITY SECTION:
yahoo.com. 20h6m42s IN NS ns2.yahoo.com.
yahoo.com. 20h6m42s IN NS ns1.yahoo.com.
yahoo.com. 20h6m42s IN NS ns3.yahoo.com.
yahoo.com. 20h6m42s IN NS ns4.yahoo.com.
yahoo.com. 20h6m42s IN NS ns5.yahoo.com.
yahoo.com. 20h6m42s IN NS ns6.yahoo.com.
yahoo.com. 20h6m42s IN NS ns8.yahoo.com.

;; ADDITIONAL SECTION:
ns2.yahoo.com. 30m42s IN A 68.142.255.16
ns1.yahoo.com. 30m42s IN A 66.218.71.63
ns3.yahoo.com. 30m42s IN A 217.12.4.104
ns4.yahoo.com. 30m42s IN A 68.142.196.63
ns5.yahoo.com. 30m42s IN A 216.109.116.17
ns6.yahoo.com. 2h20m21s IN A 202.43.223.170
ns8.yahoo.com. 2h20m21s IN A 202.165.104.22

;; Total query time: 603 msec
;; FROM: dexter.lan to SERVER: default -- 209.102.124.14
;; WHEN: Thu Dec 13 11:20:36 2007
;; MSG SIZE sent: 27 rcvd: 265

Paul Rogers
Rogers' Second Law: Everything you do communicates.
paulgrogersyahoo.com
http://www.geocities.com/paulgrogers
(Not responsible for anything after this line.)

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