postfix, DNS problem

[jaroslav.votruba at dvorec.eu]

posilal jsem mail do jednoho obchodu a vratila se mi chybova hlaska

Final-Recipient: rfc822; obchodATvykov.cz
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host mail.vykov.cz[193.86.238.51] said: 550
    Unrouteable address (in reply to RCPT TO command)



coz by pravdepodobne znamenalo, ze moje DNS je vadna, ale nezda se mi
(ptal jsem se pres jiny server, aby mi to nevracela lokalni DNS)


$ dig @mail.keytec.cz mail.dvorec.eu any

; <<>> DiG 9.3.3 <<>> @mail.keytec.cz mail.dvorec.eu any
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43115
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;mail.dvorec.eu.                        IN      ANY

;; ANSWER SECTION:
mail.dvorec.eu.         10782   IN      A       89.31.47.158

;; AUTHORITY SECTION:
dvorec.eu.              73473   IN      NS      alfa.ns.active24.cz.
dvorec.eu.              73473   IN      NS      beta.ns.active24.cz.

;; ADDITIONAL SECTION:
alfa.ns.active24.cz.    147     IN      A       81.95.96.2
beta.ns.active24.cz.    1585    IN      A       81.31.37.213

;; Query time: 2 msec
;; SERVER: 85.207.55.210#53(85.207.55.210)
;; WHEN: Fri Sep  4 16:16:17 2009
;; MSG SIZE  rcvd: 132


host 89.31.47.158
158.47.31.89.in-addr.arpa domain name pointer mail.dvorec.eu.


ale ten server Vykovu dns moc ok nema


$ host mail.vykov.cz
mail.vykov.cz has address 193.86.238.51
$ host 193.86.238.51
51.238.86.193.in-addr.arpa domain name pointer mail4.pipni.cz.



Mohl by jste mi nekdo teda vysvetlit, co je kde za problem a na ci strane
Diky