I have a subscriber who is getting errors on administrative Listserv
mail from SMTP on our IBM _and_ from LSMTP on our Alpha.  The only
book I have here (1) with a definition of what's valid in a FQDN says
the underscore, as used below, is legal.  I'm also not clear how it
got to Maelstrom from SMTP3 if the error is at our end.
 
                                                 -Kary
 
(1) The Internet Message closing the book with electronic mail
    Marshall T. Rose, Prentice-Hall, '93, ISBN 0-13-092941-7, p24-25.
 
>------------------------------ Message in error -------------------------------
>Received: from SJUVM (NJE origin SMTP3@SJUVM) by SJUVM.STJOHNS.EDU (LMail
>          V1.2a/1.8a) with BSMTP id 6630; Sat, 20 Apr 1996 12:33:26 -0400
>Date: Sat, 20 Apr 96 12:33:23 EDT
>From: <[log in to unmask]>
>To: <[log in to unmask]>
>Subject: Undeliverable Mail
>
>Unable to deliver mail to some/all recipients.
>050 RCPT TO:<[log in to unmask]>
>501 Syntax Error. Unexpected Token '_'
>
>           ** Text of Mail follows **
>HELO SJUVM.STJOHNS.EDU
>MAIL FROM:<[log in to unmask]>
>RCPT TO:<[log in to unmask]>
>DATA
>Received: from SJUVM.STJOHNS.EDU (NJE origin LISTSERV@SJUVM) by
> SJUVM.STJOHNS.EDU (LMail V1.2a/1.8a) with BSMTP id 6623; Sat,
> 20 Apr 1996 12:33:22 -0400
>Date:         Sat, 20 Apr 1996 12:33:22 -0400
>From:         "L-Soft list server at St. John's University (1.8b)"
>              <[log in to unmask]>
>Subject:      Welcome to the TBI-SURV List
>To:           A User <[log in to unmask]>
 
 
>------------------------------ Message in error -------------------------------
>Received: from SJUVM (NJE origin SMTP@SJUVM) by SJUVM.STJOHNS.EDU (LMail
>          V1.2a/1.8a) with BSMTP id 0726; Sun, 21 Apr 1996 14:47:18 -0400
>Received: from maelstrom.stjohns.edu by SJUVM.stjohns.edu (IBM VM SMTP V2R3)
>   with TCP; Sun, 21 Apr 96 14:47:17 EDT
>Received: from maelstrom.stjohns.edu by maelstrom.stjohns.edu (LSMTP for
>OpenVMS
> v1.0a) with SMTP id 6C83E58A ; Sun, 21 Apr 1996 14:51:02 -1300
>Date:    Sun, 21 Apr 1996 14:51:02
>From:    LISTSERV SMTP interface <[log in to unmask]>
>Subject: Undelivered mail
>To:      [log in to unmask]
>
>An error was detected while processing the enclosed message. A list of
>the affected recipients follows. This list is in a special format that
>allows LISTSERV to automatically take action on incorrect addresses.
>
>--> Error description:
>Error-For:  [log in to unmask]
>Error-Code: 0
>Error-Text: 501 Error parsing address
>
>Error-End:  1 error(s) reported
>
>----------------------------- Undelivered message -----------------------------
>Date:         Sun, 21 Apr 1996 16:24:05 -0230
>Reply-To:     "St. John's University Traumatic Brain Injury Survivors"
>              <[log in to unmask]>
>Sender:       "St. John's University Traumatic Brain Injury Survivors"
>              <[log in to unmask]>
>From:         APoster <[log in to unmask]>
>Subject:      Re: Managing Anger Constructively
>To:           Multiple recipients of list TBI-SURV <[log in to unmask]>
>