Chello - outgoing mailserver funktioniert nicht mehr

[zahi]

hi!

ich hab chello students commect und versende in linux über den chello mailserver meine outgoing mails. doch seit gestern haut das nimmer hin und ich bekomme untenstehende fehlermeldung. kann mir wer von euch weiterhelfen? Danke!

lG.
Andi

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This is the Postfix program

I'm sorry to have to inform you that the message returned below could not be delivered to one or more destinations.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can delete your own text from the message returned below.

The Postfix program

<xxxxxxxx@gmx.at>: host mgate.chello.at[213.46.255.2] said: 551 Mail from your IP address is currently blocked based on RBL listing (in reply to RCPT TO command)

[-- Anhang #2: Delivery error report --]
[-- Typ: message/delivery-status, Kodierung: 7bit, Größe: 0,3K --]

Reporting-MTA: dns;
Arrival-Date: Thu, 3 Nov 2005 11:58:33 +0100 (CET)

Final-Recipient: rfc822; xxxxxxxx@gmx.at
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host mgate.chello.at[213.46.255.2] said: 551 Mail from your IP address is currently blocked based on RBL listing (in reply to RCPT TO command)
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