Strange determination of an error address in Zmailer 2.1.2

[Chris Siebenmann <cks@sys.toronto.edu>]

 Periodically, our Zmailer 2.1.2 mysteriously decides to send an
delivery (for no local user) error message to what I think is the
wrong address -- not the SMTP Mail From: line, at least according
to the logs. Does anyone have any clues what would cause this? Has
anyone seen this before?

 I've attacked the relevant headers and log bits if anyone can
see clues in them. Thanks in advance.

	- cks

[the message itself:]
! To:     "EDUC POLICY ANALYSIS ARCHIVES: An Electronic Journal" <EPAA@ASUVM.INRE.        ASU.EDU>
! From:   The UTCC Post Office <postmaster@utcc.utoronto.ca>
! Subject: Delivery problems with your mail
[...]
! ----------  Original Message  ----------
! external
! rcvdfrom VMS.DC.LSOFT.COM ([205.186.43.2])
! with SMTP
! from <owner-epaa@ASUVM.INRE.ASU.EDU>
! to <bick@UTCC.UTORONTO.CA>
! Received: from PEACH.EASE.LSOFT.COM (205.186.43.4) by VMS.DC.LSOFT.COM (LSMTP for OpenVMS v0.1a) with SMTP id F3732398 ; Thu, 12 Oct 1995 17:02:18 -0400
! Received: from ASUVM.INRE.ASU.EDU by ASUVM.INRE.ASU.EDU (LISTSERV release 1.8b)          with NJE id 8490 for EPAA@ASUVM.INRE.ASU.EDU; Thu, 12 Oct 1995
!           13:58:10 -0700
! Received: from ASUACAD (NJE origin ATGVG@ASUACAD) by ASUVM.INRE.ASU.EDU (LMail
!           V1.2a/1.8a) with BSMTP id 8205; Thu, 12 Oct 1995 13:58:08 -0700
! Message-ID:  <EPAA%95101213581123@ASUVM.INRE.ASU.EDU>
! Date:         Thu, 12 Oct 1995 13:56:46 MST
! Reply-To:     Gene Glass <ATGVG@ASUACAD.BITNET>
! Sender:       "EDUC POLICY ANALYSIS ARCHIVES: An Electronic Journal"
!               <EPAA@ASUVM.INRE.ASU.EDU>
! From:         Gene Glass <ATGVG@ASUACAD.BITNET>
! Subject:      EPAA Vol. 3 No. 15: Galis & Tanner "Inclusion in Elementary
!               Schools"
! To:           Multiple recipients of list EPAA <EPAA@ASUVM.INRE.ASU.EDU>
[...]

[the original message log:]
! <EPAA%95101213581123@ASUVM.INRE.ASU.EDU>: address: owner-epaa@ASUVM.INRE.ASU.EDU
! <EPAA%95101213581123@ASUVM.INRE.ASU.EDU>: file: 336733 <owner-epaa@ASUVM.INRE.ASU.EDU> => <bick@UTCC.UTORONTO.CA>
! <EPAA%95101213581123@ASUVM.INRE.ASU.EDU>: address: bick@UTCC.UTORONTO.CA
! <EPAA%95101213581123@ASUVM.INRE.ASU.EDU>: recipient: local - bick
! <EPAA%95101213581123@ASUVM.INRE.ASU.EDU>: info: uid 1 gid 0 size 71500 headersize 958 bodysize 70542 now 813532185 delay 14 resent no trusted yes external external rcvdfrom VMS.DC.LSOFT.COM ([205.186.43.2]) with SMTP

[and the message log of the outgoing message:]
! <95Oct12.171007edt.336731@gpu.utcc.utoronto.ca>: file: 336731 The UTCC Post Office <postmaster> => The Postmaster <maildrop>, "EDUC POLICY ANALYSIS ARCHIVES: An Electronic Journal" <EPAA@ASUVM.INRE.ASU.EDU>
[...]
! <95Oct12.171007edt.336731@gpu.utcc.utoronto.ca>: info: uid 0 gid 0 size 72188 headersize 198 bodysize 71990 now 813532207 delay 8 resent no trusted yes channel error