Having a problem with Mailman and Hotmail.
The sender appears as (Unknown) and the subject line simply says (No Subject).
All other e-mail providers are fine and show the correct Sender and Subject line.
We are sending out a HTML Newsletter to a database of 15,000 people.
Here is the Message Header from the Hotmail recieved e-mail (I've removed our email details, IP etc to hide our privacy):
x-store-info:sbevkl2QZR7OXo7WID5ZcaZ0jeT0hTF67wC3GlgJLKuNX2JLoVmz6SozALo6vOlfS+MPHBYgjfNdgHNtL6Oj1VzhHVVE6jS52YXoHY6PIlfBFuk8eyRTUDPdrbApHJX+8v6Mqf+6hTU= Authentication-Results: hotmail.com; sender-id=none (sender IP is 46.17.90.138) header.sender=E-MAIL REMOVED; dkim=none; x-hmca=none X-SID-PRA: E-MAIL REMOVED X-DKIM-Result: None X-Message-Status: n:0:n X-SID-Result: None X-AUTH-Result: NONE X-Message-Delivery: Vj0xLjE7dXM9MDtsPTA7YT0wO0Q9MTtHRD0xO1NDTD0w X-Message-Info: J97kXdVaP39U+I3F4qoyky3fsu0kb0eo4+2S6uZvFiMMmAPn3sBWpjtm43bSEx8uJBfBauawku0M8ahba85gims9RAWiQ1Se5C0/TaFlGEW9YMu3mTiiNr1NdRT7k/UfHBCkzx4TC2wJ2my7h3/MLA== Received: from E-MAIL REMOVED ([46.17.90.138]) by SNT0-MC2-F29.Snt0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4900); Fri, 20 Apr 2012 09:03:35 -0700 X-No-Auth: unauthenticated sender X-No-Auth: unauthenticated sender X-No-Auth: unauthenticated sender X-No-Auth: unauthenticated sender X-No-Auth: unauthenticated sender Received: from E-MAIL REMOVED (mail.pearlanddean.com [IPv6:::1]) by E-MAIL REMOVED (Postfix) with ESMTP id AE0BDC22AE; Fri, 20 Apr 2012 17:04:43 +0100 (BST) X-No-Relay: not in my network Received: from P0010101 (83-244-245-26.cust-83.exponential-e.net [83.244.245.26]) by E-MAIL REMOVED (Postfix) with ESMTPA id 67DA8BFE58 for <E-MAIL REMOVED>; Fri, 20 Apr 2012 17:04:31 +0100 (BST) From: <E-MAIL REMOVED> To: <E-MAIL REMOVED> Subject: Lockout, Salmon Fishing In The Yemen & more! Competition & Picture Quiz! Date: Fri, 20 Apr 2012 17:10:39 +0100 Message-ID: <F00845961A5C487C894477B1B2CA384A@pd.int> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0000_01CD1F18.82B887A0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Ac0fECC4kM+iNJZaSzuBDMDrAJjp1g== X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5931 X-BeenThere: E-MAIL REMOVED X-Mailman-Version: 2.1.12 Precedence: list Reply-To: E-MAIL REMOVED List-Id: <E-MAIL REMOVED> List-Unsubscribe: <http://URL REMOVED>, <mailto:E-MAIL REMOVED?subject=unsubscribe> List-Archive: <URL REMOVED> List-Help: <mailto:E-MAIL REMOVED> List-Subscribe: <URL REMOVED, <mailto:E-MAIL REMOVED> Sender: E-MAIL REMOVED Errors-To: E-MAIL REMOVED Return-Path: E-MAIL REMOVED X-OriginalArrivalTime: 20 Apr 2012 16:03:37.0161 (UTC) FILETIME=[2522A390:01CD1F0F]
This is a multi-part message in MIME format.
------=_NextPart_000_0000_01CD1F18.82B887A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable