Hjälp mig att tolka e-post-felet, snälla!

Jag har problem att nå en e-postadress och behöver hjälp att tolka följande felmeddelande. Problemet blir lite konstigare av att breven som skickas sporadiskt verkar komma fram men oftast får detta oavsett vartifrån man skickar det.

This report relates to a message you sent with the following header fields:

  Return-path: <niklasbrunberg (hos) mac.se>
  Received: from tcp-daemon.mu.unit.liu.se by mu.unit.liu.se
   (iPlanet Messaging Server 5.2 HotFix 1.17 (built Jun 23 2003))
   id <0I520011RFTUJQ (hos) mu.unit.liu.se> (original mail from niklasbrunberg (hos) mac.se)
   ; Mon,  4 Oct 2004 17:17:54 +0200 (MEST)
  Received: from elysium.unit.liu.se (elysium.unit.liu.se [130.236.230.145])
   by mu.unit.liu.se
   (iPlanet Messaging Server 5.2 HotFix 1.17 (built Jun 23 2003))
   with ESMTP id <0I5200DADFTUUU (hos) mu.unit.liu.se> for liu (hos) weyde.se
   (ORCPT chawe181 (hos) student.liu.se); Mon, 04 Oct 2004 17:17:54 +0200 (MEST)
  Received: by elysium.unit.liu.se (Postfix, from userid 102)	id F1A633407F; Mon,
   04 Oct 2004 17:17:24 +0200 (MEST)
  Received: from av13-2-sn4.m-sp.skanova.net
   (av13-2-sn4.m-sp.skanova.net [81.228.10.103])	by elysium.unit.liu.se (Postfix)
   with ESMTP id A2C603407C	for <chawe181 (hos) student.liu.se>; Mon,
   04 Oct 2004 17:17:13 +0200 (MEST)
  Received: by av13-2-sn4.m-sp.skanova.net (Postfix, from userid 502)
   id 8E88E37E47; Mon, 04 Oct 2004 17:17:13 +0200 (CEST)
  Received: from smtp4-2-sn4.m-sp.skanova.net
   (smtp4-2-sn4.m-sp.skanova.net [81.228.10.180])	by av13-2-sn4.m-sp.skanova.net
   (Postfix) with ESMTP id 8008237E44	for <chawe181 (hos) student.liu.se>; Mon,
   04 Oct 2004 17:17:13 +0200 (CEST)
  Received: from [192.168.2.101]
   (c83-250-11-19.bredband.comhem.se [83.250.11.19])	by
   smtp4-2-sn4.m-sp.skanova.net (Postfix) with ESMTP id 53F6037E43	for
   <chawe181 (hos) student.liu.se>; Mon, 04 Oct 2004 17:17:13 +0200 (CEST)
  Date: Mon, 04 Oct 2004 17:17:08 +0200
  From: Niklas Brunberg <niklasbrunberg (hos) mac.se>
  Subject: =?ISO-8859-1?Q?Re:_Att_bli_en_fullfj=E4drad_kogvetare...?=
  In-reply-to: <86728986570a.86570a867289 (hos) liu.se>
  To: Charles Weyde <chawe181 (hos) student.liu.se>
  Message-id: <767AAF8C-1618-11D9-9C2F-000393974EC4 (hos) mac.se>
  MIME-version: 1.0
  X-Mailer: Apple Mail (2.619)
  Content-type: multipart/signed; protocol="application/pkcs7-signature";
   boundary=Apple-Mail-3-484230107; micalg=sha1
  X-Spam-Checker-Version: SpamAssassin 2.64-liu_20040909_1730 (2004-01-11) on
  	elysium.student.liu.se
  X-Spam-Level:
  X-Spam-Status: No, hits=0.7 required=5.0 tests=DRUGS_MUSCLE,
  	LIU_MAILTO_TO_LIUSTUDENT,MAILTO_TO_SPAM_ADDR,RATWR8_MESSID	autolearn=no
   version=2.64-liu_20040909_1730
  References: <86728986570a.86570a867289 (hos) liu.se>

Your message cannot be delivered to the following recipients:

  Recipient address: liu (hos) weyde.se
  Original address: chawe181 (hos) student.liu.se
  Reason: Remote SMTP server has rejected address
  Diagnostic code: smtp;550 5.1.1 <liu (hos) weyde.se> is not a valid mailbox
  Remote system: dns;mx1.activeisp.com (TCP|130.236.230.139|37295|213.188.134.17|25) (webmail.activeisp.com  MailSite ESMTP Receiver Version 5.3.11.0 Ready)

Reporting-MTA: dns;mu.unit.liu.se (tcp-daemon)

Original-recipient: rfc822;chawe181 (hos) student.liu.se
Final-recipient: rfc822;liu (hos) weyde.se
Action: failed
Status: 5.1.1 (Remote SMTP server has rejected address)
Remote-MTA: dns;mx1.activeisp.com (TCP|130.236.230.139|37295|213.188.134.17|25)
 (webmail.activeisp.com  MailSite ESMTP Receiver Version 5.3.11.0 Ready)
Diagnostic-code: smtp;550 5.1.1 <liu (hos) weyde.se> is not a valid mailbox

Edit: Bytte ut @ mot " (hos) ". Bra idé Danne V!

Your message cannot be delivered to the following recipients:

  Recipient address: liu (hos) weyde.se
  Original address: chawe181 (hos) student.liu.se
  Reason: Remote SMTP server has rejected address
  Diagnostic code: smtp;550 5.1.1 <liu (hos) weyde.se> is not a valid mailbox
  Remote system: dns;mx1.activeisp.com (TCP|130.236.230.139|37295|213.188.134.17|25) (webmail.activeisp.com  MailSite ESMTP Receiver Version 5.3.11.0 Ready)

Reporting-MTA: dns;mu.unit.liu.se (tcp-daemon)

Original-recipient: rfc822;chawe181 (hos) student.liu.se
Final-recipient: rfc822;liu (hos) weyde.se
Action: failed
Status: 5.1.1 (Remote SMTP server has rejected address)
Remote-MTA: dns;mx1.activeisp.com (TCP|130.236.230.139|37295|213.188.134.17|25)
 (webmail.activeisp.com  MailSite ESMTP Receiver Version 5.3.11.0 Ready)
Diagnostic-code: smtp;550 5.1.1 <liu (hos) weyde.se> is not a valid mailbox

Om jag fattat det rätt så är det den SMTP-server jag använder som inte hittar adressen jag ska skicka till på universitetsservern?

Tack för hjälpen b0bben! Det var det jag gissade mig till efter ett tag också och det visade sig att det hade hamnat några konstiga tecken i mottagarens första adress-forwarding, så den skickade aldrig vidare brevet korrekt och blev bara sur på avsändaren istället.