For a few days now, I have received the message below every time someone in my listserv posts to the group. However, when I review current subscribers, I see that the subscriber(jdoe-a pseudonym for privacy) is listed with a different address([log in to unmask]) than the problem one([log in to unmask]). If my eyesight is correct, the problem address is missing a period(.) after the "u" and before "washington."( Perhaps this subscriber's address was once " u.washington.edu." I cannot be sure because I only review the list periodically. ) What confuses me is why the listserv has him with a different address than the one listed in its own files. How can I fix the problem? Thanks,Pat ********************** Date: Wed, 24 Aug 1994 07:38:31 -0700 From: [log in to unmask] (Mail Delivery Subsystem) Subject: Returned mail: Host unknown (Name server: uwashington.edu: host not found) To: <[log in to unmask]> The original message was received at Wed, 24 Aug 1994 07:38:30 -0700 from jekyll.ucsf.EDU [128.218.17.42] ----- The following addresses had delivery problems ----- <[log in to unmask]> (unrecoverable error) ----- Transcript of session follows ----- 501 <[log in to unmask]>... 550 Host unknown (Name server: uwashington.edu: host not found) ----- Original message follows ----- Return-Path: <<@VM.UCS.UALBERTA.CA:[log in to unmask]>> Received: from jekyll.ucsf.EDU by cgl.ucsf.EDU (8.6.7/GSC4.24) id HAA04346 for <[log in to unmask]>; Wed, 24 Aug 1994 07:38:30 -0700 Received: from vm.ucs.UAlberta.CA ([129.128.12.10]) by jekyll.ucsf.EDU (4.1/GSC4.22) id AA00740; Wed, 24 Aug 94 07:42:06 PDT Message-Id: <[log in to unmask]> Received: from VM.UCS.UALBERTA.CA by vm.ucs.UAlberta.CA (IBM VM SMTP V2R1) with BSMTP id 4815; Wed, 24 Aug 94 08:36:58 MDT Received: from VM.UCS.UALBERTA.CA (NJE origin LISTSERV@UALTAVM) by VM.UCS.UALBERTA.CA (LMail V1.1d/1.7f) with BSMTP id 4718; Wed, 24 Aug 1994 08:36:56 -0600 Date: Wed, 24 Aug 1994 10:35:32 EDT Reply-To: xxxxxxxxx(deleted for privacy) Sender: MEDLAB-L is a discussion group for medical laboratory professionals <[log in to unmask]> From:...........