problem mit postfix

[NasenBär]

hy!

hier der log-eintrag:

Mar 31 20:10:09 jankech postfix/smtp[13625]: send attr original_recipient = mail@gmx.at
Mar 31 20:10:09 jankech postfix/smtp[13625]: send attr recipient = mail@gmx.at
Mar 31 20:10:09 jankech postfix/smtp[13625]: send attr reason = Name service error for name=gmx.at type=MX: Host not found, try again
Mar 31 20:10:09 jankech postfix/smtp[13625]: private/defer socket: wanted attribute: status
Mar 31 20:10:09 jankech postfix/smtp[13625]: input attribute name: status
Mar 31 20:10:09 jankech postfix/smtp[13625]: input attribute value: 0
Mar 31 20:10:09 jankech postfix/smtp[13625]: private/defer socket: wanted attribute: (list terminator)
Mar 31 20:10:09 jankech postfix/smtp[13625]: input attribute name: (end)
Mar 31 20:10:09 jankech postfix/smtp[13625]: 68744C037: to=<mail@gmx.at>, relay=none, delay=79965, status=deferred (Name service error for name=gmx.at type=MX: Host not found, try again)
Mar 31 20:10:09 jankech postfix/smtp[13625]: flush_add: site gmx.at id 68744C037
Mar 31 20:10:09 jankech postfix/smtp[13625]: connect to subsystem public/flush
Mar 31 20:10:09 jankech postfix/smtp[13625]: send attr request = add
Mar 31 20:10:09 jankech postfix/smtp[13625]: send attr site = gmx.at
Mar 31 20:10:09 jankech postfix/smtp[13625]: send attr queue_id = 68744C037
Mar 31 20:10:09 jankech postfix/smtp[13625]: public/flush socket: wanted attribute: status
Mar 31 20:10:09 jankech postfix/smtp[13625]: input attribute name: status
Mar 31 20:10:09 jankech postfix/smtp[13625]: input attribute value: 4
Mar 31 20:10:09 jankech postfix/smtp[13625]: public/flush socket: wanted attribute: (list terminator)
Mar 31 20:10:09 jankech postfix/smtp[13625]: input attribute name: (end)
Mar 31 20:10:09 jankech postfix/smtp[13625]: flush_add: site gmx.at id 68744C037 status 4
Mar 31 20:10:09 jankech postfix/smtp[13625]: deliver_request_final: send: "Name service error for name=gmx.at type=MX: Host not found, try again" -1
Mar 31 20:10:09 jankech postfix/smtp[13625]: send attr reason = Name service error for name=gmx.at type=MX: Host not found, try again
Mar 31 20:10:09 jankech postfix/smtp[13625]: send attr status = 4294967295
Mar 31 20:10:09 jankech postfix/smtp[13625]: master_notify: status 1
Mar 31 20:10:09 jankech postfix/smtp[13625]: connection closed

warum kann er nicht den host finden?
hab im netzt nichts brauchbares gefunden!? wie ich schon sagte, funktioniert nslookup!

mfg