Postfix Problem

[juerg]

Ich habe in meinem /etc/log/mail.log folgende Einträge:

Nov 17 10:56:02 ispcp postfix/smtp[5621]: 7FAE3C58664: to=<webmin@ispcp>, relay=none, delay=0.02, delays=0.01/0/0.01/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=ispcp type=A: Host not found)
Nov 17 10:56:02 ispcp postfix/qmgr[5447]: 7FAE3C58664: removed
Nov 17 10:56:02 ispcp postfix/smtp[5618]: 761E5C58678: to=<webmin@ispcp>, relay=none, delay=0.12, delays=0.02/0/0.1/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=ispcp type=A: Host not found)
Nov 17 10:56:02 ispcp postfix/qmgr[5447]: 761E5C58678: removed

Was muss ich in meinem externen DNS eintragen? Ich habe dies im Moment:

A Record web4you-gmbh.ch
C Record *

Tnx