I'm not "seeing" the same MX hostnames that is reported below.  I wonder
if you are working with obsolete cached copies of DNS records or perhaps
some anti-spam a/v filters that need updating?

Editorial comment -- some list-definition changes should be considered e.g.,

REVIEW= OWNER
Notebook= Yes,A,Weekly,PRIVATE

--

I had no problem getting the LISTSERV machine to respond ...

Received: from f05n11.cac.psu.edu (r02a07.cac.psu.edu [146.186.15.17])
        by f07n01.cac.psu.edu (8.9.3/8.9.3) with ESMTP id KAA167626
        for <[log in to unmask]>; Tue, 29 Oct 2002 10:12:22 -0500
Received: (from daemon@localhost)
        by f05n11.cac.psu.edu (8.9.3/8.9.3) id KAA58448
        for [log in to unmask]; Tue, 29 Oct 2002 10:12:22 -0500
Received: from central.ulcc.ac.uk ([log in to unmask] [193.63.88.11])
        by f05n11.cac.psu.edu (8.9.3/8.9.3) with ESMTP id KAA245774
        for <[log in to unmask]>; Tue, 29 Oct 2002 10:12:20 -0500
Received: from tpmde-48.tpmde.ac.uk ([193.62.94.48])
        by central.ulcc.ac.uk with esmtp (Exim 2.12 #1)
        id 186Y2U-00074j-00
        for [log in to unmask]; Tue, 29 Oct 2002 15:12:19 +0000
Date:         Tue, 29 Oct 2002 15:45:23 +0000
X-PH: V4.1@f05n11
From: "L-Soft list server at TPMDE-48.TPMDE.AC.UK (1.8d)"
               <[log in to unmask]>
Subject:      File: "HLTHPROM-RESOURCES LIST"
To: [log in to unmask]
Message-Id: <[log in to unmask]>

* Health Promotion Resource Workers Electronic Discussion List
*
* Review= Public      Subscription= By Owner,confirm    Send= Private
* Notify= Yes         Reply-to= List,Respect       Files= No
* Stats= Normal,Private   Validate= No
* Notebook= Yes,A,Weekly,Public
*
* Owner= [log in to unmask]
* Owner= [log in to unmask]
* Owner= Quiet:
* Owner= [log in to unmask]
* Owner= [log in to unmask]

(list of 153 subscribers suppressed by pmw1)
/Pete

At 05:19 10/29/2002 Tuesday, ROUSSEAU, Naomi wrote:
 >Has anyone experienced problems with users subscribed from NHSnet addresses?
 >I have a lot of users who are on NHSnet, and not all of them have had
 >problems, but there are some users who have been unable to post to one of
 >our lists, even though they are subscribed, and they are all sending from
 >NHSnet.  I've copied one of the error messages below, any ideas?
 >
 > -----Original Message-----
 >    From: Mail Delivery Subsystem
 >    [mailto:[log in to unmask]]
 >    Sent: Wednesday, October 09, 2002 02:11
 >    To: [log in to unmask]
 >    Subject: Returned mail: User unknown
 >
 >
 >
 >    The original message was received at Wed, 9 Oct 2002 14:10:34 +0100
 >    from uucp@localhost
 >
 >       ----- The following addresses had delivery problems -----
 >    <[log in to unmask]>  (unrecoverable error)
 >
 >       ----- Transcript of session follows -----
 >    ... while talking to mail2.nhs.uk.:
 >    >>> RCPT To:<[log in to unmask]>
 >    <<< 550 relaying to <[log in to unmask]> prohibited
 >by
 >    administrator
 >    550 <[log in to unmask]>... User unknown