Year-old messages

[Svein Halvor Halvorsen]

How come I get all these year-old messages coming in today?
I got a couple of dozen of these in both questions@, current@ and stable at .

Here's an exerpt from the headers of one such message
What's mu.org got to do with this?

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Received: from elvis.mu.org (elvis.mu.org [192.203.228.196])
    by mx1.FreeBSD.org (Postfix) with ESMTP id 0ED3443E37;
    Sun,  3 Jul 2005 00:08:49 +0000 (GMT) (envelope-from ps at mu.org)
Received: by elvis.mu.org (Postfix, from userid 1000)
    id 823A25DCAC; Sat,  2 Jul 2005 17:07:57 -0700 (PDT)
X-Original-To: ps at mu.org
Delivered-To: ps at mu.org
Received: from mx2.freebsd.org (mx2.freebsd.org [216.136.204.119])
    by elvis.mu.org (Postfix) with ESMTP id 03A7E5C913
    for <ps at mu.org>; Thu, 23 Dec 2004 08:27:48 -0800 (PST)
Received: from hub.freebsd.org (hub.freebsd.org [216.136.204.18])
    by mx2.freebsd.org (Postfix) with ESMTP
    id EAAEC56FEC; Thu, 23 Dec 2004 16:27:06 +0000 (GMT)
    (envelope-from owner-freebsd-arch at freebsd.org)