Possible to change return path?

I'm tried to [email protected] but I couldn't because I'm not a member.
Well, I am. I think the problem is that sqwebmail set the return path to
my shell login instead of the email alias that I use. Short of creating
a login for all the aliases I use, is there another solution?

Return-Path: <[email protected]>
Received: (qmail 20976 invoked by uid 0); 15 Jun 2004 17:29:46 -0000
Received: from unknown (HELO usnj1.procreatie.nl) (66.45.234.61)
  by evanston.inter7.com with SMTP; 15 Jun 2004 17:29:46 -0000
Received: (qmail 78998 invoked by uid 89); 15 Jun 2004 17:41:12 -0000
Message-ID: <[email protected]>
From: "Charles M. Gerungan" <[email protected]>
To: [email protected]
Reply-To: [email protected]
Subject: Sort of skel files for maildrop
Date: Tue, 15 Jun 2004 19:41:12 +0200
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-- 
Regards, Charles.