Ok, so the problem is that outlook generates reference headers like this: References: <F83CnzNwRC6HixqDCZx0000127b@hotmail.com><004001c1fe06$3f5be350$a3c5e80c@MoeA> <011c01c1fe07$6d8edd30$647ba8c0@C1912731A>

Note that there is no space between the first and second items. I haven't checked in the RFCs, but I'm fairly sure it's invalid.

Unfortunately, mailman kind of chockes on it. It fails to parse it and throws some of the headers in the body

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From someuser@sf.net Fri May 17 18:15:25 2002 Date: Fri, 17 May 2002 18:15:25 -0700 From: Marc MERLIN <someuser@sf.net> To: test@lists.somedomain.tld Subject: testing reference field References: <F83CnzNwRC6HixqDCZx0000127b@hotmail.com><004001c1fe06$3f5be350$a3c5e80c@MoeA> <011c01c1fe07$6d8edd30$647ba8c0@C1912731A>

test 2

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From merlin@sf.net Fri May 17 18:15:25 2002 Date: Fri, 17 May 2002 18:15:25 -0700 From: Marc MERLIN <merlin@sf.net> To: test@lists.somedomain.tld Subject: testing reference field References: <F83CnzNwRC6HixqDCZx0000127b@hotmail.com><004001c1fe06$3f5be350$a3c5e80c@MoeA> <011c01c1fe07$6d8edd30$647ba8c0@C1912731A>

test 2

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