Here's an example of the effect of source routing on the LISTSERV
subscription confirmation process.  This is rather confusing to
the neophyte user.
 
1) I used "TELL LISTSERV AT UBVM SUB GOPHERN" to request a subscription
   to the GOPHERN list.  Here's the header of the response.
 
 
Received: from UBVM.CC.BUFFALO.EDU by SUVM (Mailer R2.10 ptf000) with BSMTP id
 2165; Wed, 29 Sep 93 09:52:30 LCL
Received: from UBVM.CC.BUFFALO.EDU (NJE origin LISTSERV@UBVM) by
 UBVM.CC.BUFFALO.EDU (LMail V1.1d/1.7f) with BSMTP id 1677; Wed, 29 Sep 1993
 09:53:06 -0400
Date:         Wed, 29 Sep 1993 09:53:06 -0400
From:         BITNET list server at UBVM (1.7f) <[log in to unmask]>
Subject:      Command confirmation request (41E4F9)
To:           Glenn Malling <[log in to unmask]>
X-LSV-ListID: GOPHERN
 
Your command:
 
                        SUBSCRIBE GOPHERN Glenn Malling
 
etc.
 
 
2) I used RiceMail to reply.  Note the FQDN in the From: line of
   the above message.  My reply was sent to [log in to unmask]
   not [log in to unmask]  DOMAIN NAMES instructs the mailer to send the
   message to SMTP@UBVM resulting in the source route of my address
   as shown in the next response.
 
 
Received: from UBVM.CC.BUFFALO.EDU by SUVM (Mailer R2.10 ptf000) with BSMTP id
 2605; Wed, 29 Sep 93 09:58:25 LCL
Received: from UBVM.CC.BUFFALO.EDU (NJE origin LISTSERV@UBVM) by
 UBVM.CC.BUFFALO.EDU (LMail V1.1d/1.7f) with BSMTP id 2162; Wed, 29 Sep 1993
 09:58:34 -0400
Date:         Wed, 29 Sep 1993 09:58:34 -0400
From:         BITNET list server at UBVM (1.7f) <[log in to unmask]>
Subject:      Output of your job "NETMAN%SUVM"
To:           [log in to unmask]
 
> ok
The confirmation code you gave (41E4F9)  does not correspond to any pending
command, either because you did not  confirm the command in time or because
you mistyped the confirmation code. Check the confirmation request again to
make sure you typed the code exactly as  it was shown. If you lost it, just
issue the command again to get a new code.
 
 
3) I then tried another reply from RiceMail after changing the To:
   line from [log in to unmask] to [log in to unmask]  This
   time the confirmation was accepted.
 
 
Received: from UBVM.CC.BUFFALO.EDU by SUVM (Mailer R2.10 ptf000) with BSMTP id
 2982; Wed, 29 Sep 93 10:04:30 LCL
Received: from UBVM.CC.BUFFALO.EDU (NJE origin LISTSERV@UBVM) by
 UBVM.CC.BUFFALO.EDU (LMail V1.1d/1.7f) with BSMTP id 3113; Wed, 29 Sep 1993
 10:05:20 -0400
Date:         Wed, 29 Sep 1993 10:05:20 -0400
From:         BITNET list server at UBVM (1.7f) <[log in to unmask]>
Subject:      Output of your job "NETMAN"
To:           Glenn Malling <[log in to unmask]>
 
> ok
Confirming:
> SUBSCRIBE GOPHERN Glenn Malling
You have been added to list GOPHERN.
 
 
It seems to me that the problem is in having DOMAIN NAMES route mail
directly to a SMTP that will apply a source route.  Had the entry
for BUFFALO.EDU in DOMAIN NAMES referenced MAILER@UBVM instead
*and* had MAILER@UBVM directly delivered mail addressed to
[log in to unmask] without passing it through a SMTP
the confusion would not have happened.
 
 
Glenn A. Malling (NETMAN@SUVM) or [log in to unmask]
Syracuse University Computing Services   +1 (315) 443-4111
Machinery Hall  Syracuse, New York 13244-1260