[imp] Message Header

[Hammad]

Can anyone tell me how to fix the following message header I am seeing. Two
emails were sent to me, first one from another another domain using IMP3.1 and
second email was sent using the same account but sent via Outlook Express using
same smtp server (Qmail)

The email which was sent via IMP 3.1 has a "Received: from" header as:

Received: (qmail 14143 invoked by uid 48); 24 Feb 2003 16:11:41 -0000
Received: from xxx.xxx.xx.xxx( [xxx.xxx.xx.xxx])
	as user hammad at brisksolutions.com@imap.xyz123.com by 
                                          ^^^^^^^^^^^^^^^
mail.xyz123.com with HTTP;


Question: How can I stop IMP to send out the IMAP server info marked by ^?

If someone things its QMAIL not IMP doing this then how come I don't see it when
email is sent via Outlook Express whois output follows:

Received: (qmail 14182 invoked from network); 24 Feb 2003 16:12:29 -0000
Received: from xxx-xx-xxx-xxx.xyz123.com (HELO R2D2) (xxx.xxx.xx.xxx)
  by 0 with SMTP; 24 Feb 2003 16:12:29 -0000


--
Hammad