[comp.mail.headers] incorrect "From:"

john@news%jho@iex.com (john) (05/09/91)

I have just set up my system "jho" to talk to another 
system called "iex" through UUCP. My problem is when I
send out mail, the "From:" address appeared to be wrong.
It shows as 
	"From: iex!unix.iex.com!john@uunet.UU.NET (john)"
but I think the correct address should be.
	"From: iex!jho!john@uunet.UU.NET (john)"
Who is modifiying that address and how can I fix it?

--------- Old mail I send to my friend --------- 
>From iex!jho!john@uunet.UU.NET Tue Apr 30 10:34:32 1991
Return-Path: <iex!jho!john@uunet.UU.NET>
Received: from tilde by yale.csc.ti.com (4.1/SMI-4.1)
	id AA04453; Tue, 30 Apr 91 10:34:31 CDT
Received: from ti.com by tilde id AA24365; Tue, 30 Apr 91 10:34:29 -0500
Received: from relay1.UU.NET by ti.com id AA15894; Tue, 30 Apr 91 10:34:33 -0500
Received: from iex.UUCP by relay1.UU.NET with UUCP 
	(5.61/UUNET-shadow-mx) id AA22039; Tue, 30 Apr 91 11:32:56 -0400
Received: from jho.UUCP by iex.iex.com (AA13105) with UUCP; Tue, 30 Apr 91 09:22:25 -0600
Received: by unix.UUCP (5.51/smail2.2/06-30-87)
	id AA09113; Tue, 30 Apr 91 10:14:44 CST
From: iex!unix.iex.com!john@uunet.UU.NET (john)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Message-Id: <9104301614.AA09113@unix.UUCP>
Subject: Re: got you
To: ywong@yale.csc.ti.com (Yiwan Wong)
Date: Tue, 30 Apr 91 10:14:43 CST
In-Reply-To: <9104301455.AA04255@yale.csc.ti.com>; from "Yiwan Wong" at Apr 30, 91 9:55 am
X-Mailer: ELM [version 2.3 PL0]

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John Ho from dallas, texas, usa.
uunet!iex!jho!john