Joan: >>X-Delivery-Notice: SMTP MAIL FROM does not correspond to sender. >>Received: from PUCC.PRINCETON.EDU (VMMAIL) by UMDD.UMD.EDU (Mailer R2.08 >> PTF008) with BSMTP id 5012; Sat, 13 Feb 93 02:10:10 EST >>Received: from PUCC.PRINCETON.EDU by PUCC.PRINCETON.EDU (Mailer R2.10 ptf004) >> with BSMTP id 1240; Sat, 13 Feb 93 02:09:56 EST >>Received: from PUCC (NJE origin SMTPD@PUCC) by PUCC.PRINCETON.EDU (LMail >> V1.1c/1.7e) with BSMTP id 6784; Sat, 13 Feb 1993 02:09:57 -0500 >>Date: Sat, 13 Feb 93 02:09:56 EST >>From: <[log in to unmask]> >>To: <@PUCC.PRINCETON.EDU:[log in to unmask]> >>Subject: Undeliverable Mail >> >>pucc.PRINCETON.EDU unable to deliver following mail to recipient(s): >> <[log in to unmask]> >>550 Host 'HELIOS.UWC.EDU' Unknown There are two entities called Name Servers for hosts that are prefixed with the UWC.EDU subdomain. One is able to lookup the host helios. and the other doesn't have a clue. Depending upon which name server is used at any point in time by the SMTP client at pucc.princeton.edu, the listserv backbone server gateway for this subscriber, the mail will be delivered or bounced. Feel free to write a nastygram to [log in to unmask] Also, feel free to do a QUIET SET list NOMAIL NOFILES FOR userid@host (telnet nic.ddn.mil output follows) @ whois uwc.edu University of Wisconsin - Centers (UWC-DOM) c/o University of Wisconsin Stevens Point, WI 54481 Domain Name: UWC.EDU Administrative Contact: Schneider, Tom (TS249) [log in to unmask] (608) 263-1794 Technical Contact, Zone Contact: Neuhauser, Tom (TN64) [log in to unmask] <========= (715) 346-2083 Record last updated on 09-Dec-92. Domain servers in listed order: UWCMAIL.UWC.EDU 143.235.1.11 DOGIE.MACC.WISC.EDU 128.104.30.17 <--------- out-of-sync for helios /Pete ([log in to unmask]) -- Peter M. Weiss | oas.psu.edu postmaster 31 Shields Bldg -- Penn State Univ.| "Connectivity is more than a Connection" University Park, PA USA 16802-1202 | E. Michael Staman, _The Circuit_, Apr 92