There seems to be get another candidate for LISTSERV's mailer hate list.
We've been getting a pile of these things ever few hours.
 
>Received: by RPIECS (Mailer R2.01) id 2521; Fri, 31 Mar 89 12:43:46 EST
>Date:         Fri, 31 Mar 89 09:57:15 CST
>Reply-To:     Public domain software servers <PCSERV-L@RPIECS>
>Sender:       Public domain software servers <PCSERV-L@RPIECS>
>From:         SMTP.Mailer@UCHIMVS1
>To:           John Fisher <FISHER@RPIECS>
>
>Unable to deliver your message to host ASTROLAB.UCHICAGO.EDU after 12 hours,
>because of: host down
>Still trying...
>
>
>