[imp] Composed message to ""@ is valid?

[Caylan Larson]

Hi,

It seems users are composing messages to: ""@

This ends up getting sent to root, here is a sample of the header:

--START_HEADER (edited for generalization)
 From user at test.com Thu Jan 15 09:02:48 2004
Return-Path: <user at test.com>
X-Original-To: ""@
Delivered-To: root at test.com
Received: from localhost (webmailserver [X.X.X.X])
	by emailserver (Postfix) with ESMTP id XXXXX5240D6
	for <""@>; Thu, 15 Jan 2004 09:01:49 -0600 (CST)
Received: from 172.16.38.187 ([172.16.38.187])
	by webmailserver (IMP) with HTTP
	for <user at test.com>; Thu, 15 Jan 2004 08:57:33 -0600
Message-ID: <1074XXXX.40XXXXXXa8f at webmailserver.test.com>
Date: Thu, 15 Jan 2004 08:57:33 -0600
From: John Doe <user at test.com>
To: someotherguy at anothertest.com.
Subject: La la la
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
User-Agent: Internet Messaging Program (IMP) 3.2.1
X-Originating-IP: 172.16.38.187
--END_HEADER

What's the best remedy?  Should I look into denying the delivery of 
these emails, or is there a patch that denies the initial creation?

Horde 2.2.3
IMP 3.2.1

Thanks for your advice,


Caylan Van Larson
Systems Administrator
Aerospace College, UND
caylan at cs.und.edu
701-777-2322