[CentOS] procmail problem with postfix

Hi Friends
  I am configuring a mailserver , basically the working of this server is to fetchmail from remote server and we have one account that is catchall account and we are using procmail to distribute all mails properly to users, n i m building new server for my company but i m getting following error if i am sending mails from outside , if i am sending mail from my own domain then there is no problem procmail is working properly. plz help me out . i have remove my domain name by example .
  thanks
   
  This is the Postfix program at host internm.example.com.

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                       The Postfix program

<root at localhost.example.com>: can't create user output file. Command
   output: procmail: Renaming bogus mailbox "/var/mail/nobody" info
   "/var/mail/BOGUS.nobody.T8r" procmail: Couldn't create "/var/mail/nobody"


  Final-Recipient: rfc822; root at localhost.dsconstructions.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; can\'t create user output file. Command output:
    procmail: Renaming bogus mailbox "/var/mail/nobody" info
    "/var/mail/BOGUS.nobody.T8r" procmail: Couldn\'t create "/var/mail/nobody"



---------- Forwarded message ----------
From: "Abhishek Singh" <abhishek.rhce at gmail.com>
To: aksingh at dsconstructions.com
Date: Wed, 13 Sep 2006 15:24:57 +0530
Subject: this is me
v

-- 
Abhishek Kumar Singh
System Administrator
D.S.C LTD.
Mob: +91-9871563248
\n\n
",0] );  //-->  
Final-Recipient: rfc822; root at localhost.example.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; can't create user output file. Command output:
   procmail: Renaming bogus mailbox "/var/mail/nobody" info
   "/var/mail/BOGUS.nobody.T8r" procmail: Couldn't create "/var/mail/nobody"

Abhishek Kr. Singh
System Administrator
DSC. LTD.
Mob.No. +91-9871563248
 				
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