Zitat von Ralf Hildebrandt <[email protected]>:

I cannot see why this doesn't work here on mail.charite.de or
mail2.charite.de:

root@mail2:~# dig @127.0.0.1 -t mx bk.bund.de

; <<>> DiG 9.8.1-P1 <<>> @127.0.0.1 -t mx bk.bund.de
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 59991
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;bk.bund.de. IN MX

;; Query time: 16 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Dec 12 21:52:22 2012
;; MSG SIZE  rcvd: 28

SERVFAIL? But why?


Good question, works fine here ;-)

; <<>> DiG 9.7.0-P1 <<>> @127.0.0.1 bk.bund.de MX
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2611
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 5, ADDITIONAL: 6

;; QUESTION SECTION:
;bk.bund.de.                    IN      MX

;; ANSWER SECTION:
bk.bund.de.             21251   IN      MX      10 mx1.bund.de.
bk.bund.de.             21251   IN      MX      10 mx2.bund.de.

;; AUTHORITY SECTION:
bund.de.                17030   IN      NS      bamberg.bund.de.
bund.de.                17030   IN      NS      xenon.bund.de.
bund.de.                17030   IN      NS      argon.bund.de.
bund.de.                17030   IN      NS      dns-1.dfn.de.
bund.de.                17030   IN      NS      nuernberg.bund.de.

;; ADDITIONAL SECTION:
mx1.bund.de.            551     IN      A       77.87.224.163
mx2.bund.de.            551     IN      A       77.87.228.110
argon.bund.de.          17030   IN      A       77.87.224.18
xenon.bund.de.          17030   IN      A       77.87.224.71
bamberg.bund.de.        17030   IN      A       77.87.228.36
nuernberg.bund.de.      17030   IN      A       77.87.228.37

;; Query time: 1 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Dec 12 23:04:29 2012
;; MSG SIZE  rcvd: 274

Maybe a reply size/EDNS problem? What does "dig +short rs.dns-oarc.net txt" tell you?

Regards

Andreas


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