[courier-users] 517-Domain does not exist: net4z.de

Hi list,

I could need some help here with a sender who's mail is not accepted by our
courier. He can send to other destinations though.

When the mail comes in, the error.log says:
Feb 8 13:18:46 jupiter courieresmtpd:
error,relay=::ffff:195.253.8.195,from=<theusername @net4z.de>: 517-Domain
does not exist: net4z.de.
Feb 8 13:18:46 jupiter courieresmtpd:
error,relay=::ffff:195.253.8.195,from=<theusername @net4z.de>: 517 Invalid
domain, see <URL:ftp://ftp.isi.edu/in-notes/rfc1035.txt>

But when I dig for that domain on the very same machine everything seems ok:

--------------------------------------------
; <<>> DiG 9.3.1 <<>> @localhost ns net4z.de
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 34320
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;net4z.de. IN NS

;; AUTHORITY SECTION:
net4z.de. 10002 IN SOA ns1.acceptus.de.
hostmaster.acceptus.net. 2000112938 10800 3600 604800 86400

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Feb 8 13:31:56 2006
;; MSG SIZE rcvd: 98
--------------------------------------------
; <<>> DiG 9.3.1 <<>> @ns1.acceptus.de ns net4z.de
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36221
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 4

;; QUESTION SECTION:
;net4z.de. IN NS

;; ANSWER SECTION:
net4z.de. 86400 IN NS NS3.ACCEPTUS.DE.
net4z.de. 86400 IN NS NS1.ACCEPTUS.DE.

;; AUTHORITY SECTION:
NET4Z.DE. 86400 IN NS NS3.ACCEPTUS.DE.
NET4Z.DE. 86400 IN NS NS1.ACCEPTUS.DE.

;; ADDITIONAL SECTION:
NS3.ACCEPTUS.DE. 86400 IN A 212.144.56.133
NS1.ACCEPTUS.DE. 86400 IN A 212.184.30.2
NS3.ACCEPTUS.DE. 86400 IN A 212.144.56.133
NS1.ACCEPTUS.DE. 86400 IN A 212.184.30.2
--------------------------------------------
; <<>> DiG 9.3.1 <<>> @ns1.acceptus.de mx net4z.de
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58323
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;net4z.de. IN MX

;; ANSWER SECTION:
net4z.de. 86400 IN MX 100 -mforward.dtag.de.
net4z.de. 86400 IN MX 20 smtp.de.acceptus.net.
net4z.de. 86400 IN MX 10 smtp.gate01.acceptus.net.

;; AUTHORITY SECTION:
NET4Z.DE. 86400 IN NS NS3.ACCEPTUS.DE.
NET4Z.DE. 86400 IN NS NS1.ACCEPTUS.DE.

;; ADDITIONAL SECTION:
NS3.ACCEPTUS.DE. 86400 IN A 212.144.56.133
NS1.ACCEPTUS.DE. 86400 IN A 212.184.30.2

--------------------------------------------

I am not sure that the problem is related to courier, but I have no idea
where to go next.
Can someone please point me in the right direction?


Thanks for your input.

Dirk Kulmsee




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