Mail failure

[binumvk]

In my cpanel linux server iam getting same error for all domains,when i try to sending email
The error log is



This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es)
failed:

pipe to |/usr/local/cpanel/3rdparty/mailman/mail/mailman post
mand@ppppx.com
generated by mand@ppppx.com
local delivery failed

The following text was generated during the delivery attempt:

------ pipe to |/usr/local/cpanel/3rdparty/mailman/mail/mailman post
mand@ppppx.com
generated bymand@ppppx.com ------

post script, list not found:mand@ppppx.com

------ This is a copy of the message, including all the headers. ------

Return-path: <root@serverxxx.com>
Received: from root by serverXXX.com with local (Exim 4.43)
id 1Cyy1-0002JG-GD
for mand@ppppx.com ; Fri, 24 Dec 2004 03:38:32 -0500
To:mand@ppppx.com
Subject: test
Message-Id: <E1Chky0-0002JG-GD@serverxx.com>
From: root <root@serverxxx.com>
Date: Fri, 24 Dec 2004 03:38:32 -0500


Any one know what is the problem

[binumvk]

please help any body