Best ISPconfig users, From the beginning one user on the server is getting alot of emails daily from the 'Mail Delivery System' containing: I replaced ip's and domainnames with: xxxx ---- This is a MIME-encapsulated message. --4965031F40.1217205959/gaia.xxxxxx.nl Content-Description: Notification Content-Type: text/plain This is the Postfix program at host gaia.xxxxxx.nl. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. 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 attached returned message. The Postfix program <[email protected]>: host localhost.localdomain.xxxxxx.nl said: 451 Temporary local problem - please try later (in reply to RCPT TO command) --4965031F40.1217205959/gaia.xxxxxxx.nl Content-Description: Delivery report Content-Type: message/delivery-status Reporting-MTA: dns; gaia.xxxxxx.nl X-Postfix-Queue-ID: 4965031F40 X-Postfix-Sender: rfc822; [email protected] Arrival-Date: Wed, 23 Jul 2008 02:35:05 +0200 (CEST) Final-Recipient: rfc822; [email protected] Action: failed Status: 4.0.0 Diagnostic-Code: X-Postfix; host localhost.localdomain.xxxxxx.nl said: 451 Temporary local problem - please try later (in reply to RCPT TO command) --4965031F40.1217205959/gaia.xxxxx.nl Content-Description: Undelivered Message Content-Type: message/rfc822 Received: from gaia.xxxxxx.nl (gaia [127.0.0.1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by gaia.xxxxxx.nl (Postfix) with ESMTP id 4965031F40 for <[email protected]>; Wed, 23 Jul 2008 02:35:05 +0200 (CEST) Received: (from [email protected]) by gaia.xxxxx.nl (8.13.1/8.13.1/Submit) id m6N0Z4h3003235 for [email protected]ldomain; Wed, 23 Jul 2008 02:35:05 +0200 Date: Wed, 23 Jul 2008 02:35:04 +0200 From: danny <[email protected]a.xxxxxx.nl> Message-Id: <[email protected]> X-Loop: [email protected]ldomain Subject: Mailsize: henkiehuisgevaar.nl_danny To: undisclosed-recipients:; 979 --------- Anyone a solution?