Well, in Paul's case it is clearly not LISTSERV's fault: Received: from SEARN (NJE origin SMTPF@SEARN) by SEARN.SUNET.SE (LMail V1.2a/1.8a) with BSMTP id 1030; Mon, 23 May 1994 06:17:33 +0200 Received: from jazz.epas.utoronto.ca by SEARN.SUNET.SE (IBM VM SMTP V2R2) with TCP; Mon, 23 May 94 06:17:31 +0200 Received: by jazz.epas.utoronto.ca (931110.SGI/931108.SGI.ANONFTP) for [log in to unmask] id AA13586; Mon, 23 May 94 00:17:38 -0400 Date: Mon, 23 May 94 00:17:38 -0400 From: [log in to unmask] (Mail Delivery Subsystem) Subject: Returned mail: unknown mailer error 12 Message-Id: <[log in to unmask]> To: [log in to unmask] ----- Transcript of session follows ----- mail: Temporary file problem 554 <[log in to unmask]>... unknown mailer error 12 ----- Unsent message follows -----