Is this a Valid return path? (e-mail query)

#0 - Nov. 4, 2010, 12:08 a.m.

I received a e-mail about someone trying to change my B.Net login e-mail address. Now normally the phishing e-mails like this have hotmail ect... return paths for the sender. But when I opened up the full headers I saw this.

Return-Path: <donotreply@blizzard.com>
X-YahooFilteredBulk: 66.232.142.80
Received-SPF: fail (mta123.mail.ac4.yahoo.com: domain of donotreply@blizzard.com does not designate 66.232.142.80 as permitted sender)
X-YMailISG: 5HAEanEcZAoNMsCGGx3BDZkvFsOfvTZahZqG2cKCUV9BHSbb 706FU1Rm6URJrw1u5lORymTKyLAdZMnX..hei8AnHj52S95n1MzoFyHrqiNH x3pRmdkSjjly6Uw13J7RT5Tf8KbeTUq.CfrxwI6krTDsjaOdiEyRINSsWrud 4WY3.n9fadDH4T.g0ILgBETPs3Ofud1XWRAcgkABe5ooKZeMowbGiFZeSffZ kQkyJyHXjkzSOQfb2gh6jhCB9eB9rtaQYTtKqWVnDthyObL6UvzwmJYq9V3u bRXEKt.PfzKSwkOfD1qM6JJYkl.yWwdQgpEbHXNQJljYdRhOuIvb08FM62PW 5wEe8nW9fX6pAzbS6C2fjkKCA_JeJgieFlqSwL1r8BlDprS_3M2.DSzRwAg_ w8ZkLfRqCV4.ll4rvV4m60bFwjswqP0aiogx5UM4u0.l79VAOghPm6.IA4Ju F0FSBZSBLQ_7UweXOVagP1d1dfqIeQCKDDwRhm.cV6JkDcZElRWitVaAmBD_ Ofa14lNtjyjiGOQinQAB3px6aNHBtFKnsTm0fCpwiP6_nv38MLtJ_Gqvs5ZT ZA0NleDt6lm6zMmfE0li7guPVXsuG8G4G7_akYTwLN5SrLOk09_chjXdQEHl m_JIsJEIZ8beeh0AJ5lCiYBz6.lX82XzNDhgmwZPuZG0UkLZjIDFTN4c4bIq QwJwP.kelMXC9rWBQN.cSn4FG1sOMIQIMiwA7KXm3.xb0xA6eaMLLoOX9NwG WKQWUoyswc424UcoHTP5pyl9SAlg3L8F.uUU3.g9AYrwZKvpy76Fkyux5Psd ez0F.CCeseE7WdEecE3YcBMH8nrWftiMZLIZ9zJdwu8Bs2J6NvJ3OsCbbFI6 YfPbQVmntI99xztuiwiBHCxS3rilU4K36t0A04CGxIBRiAca9nTO5ETkCXlM mW5rnraNG_J4joVZmTygek4ij0x2lOr4jW32TIEpSsEVF7LORmwig_gLrImm PJINw6IMznnBJ4FT7ej0WCQGqfb9cCAFBZCplSNhYSG9ATXO6CW87DhxDkR8 EbjwiE5IXqA@*!@*%!#*@#*%!*%#*#@#!!**%EDid8ZZHgsTJ_moHZ7Td8_jq8pdlsYb7k4HOKKhpNh9i xSNdE85LwDKRftZ3MLk8ZXDSFTUhwF6SLXb.uxpMCciTS4f0UYn_PQ--
X-Originating-IP: [66.232.142.80]
Authentication-Results: mta123.mail.ac4.yahoo.com from=blizzard.com; domainkeys=neutral (no sig); from=blizzard.com; dkim=neutral (no sig)
Received: from 127.0.0.1 (HELO blizzard.com) (66.232.142.80) by mta123.mail.ac4.yahoo.com with SMTP; Sun, 31 Oct 2010 13:05:20 -0700
Received: from battle.net ([192.168.160.1]) (envelope-sender <donotreply@blizzard.com>) by 192.168.160.128 with ESMTP for <>; Sun, 31 Oct 2010 12:17:39 +0800
Message-ID: <12593E4A68DEB4AD270B0279D6393194@battle.net>
From: "donotreply@blizzard.com" <donotreply@blizzard.com> Add sender to Contacts
To:
Subject: =?utf-8?B?TmV3IFJlcXVlc3TigI/igI8gTm90aWZp?= =?utf-8?B?Y2F0aW9uIC0gQ2hhbmdlIHRoZSA=?= =?utf-8?B?TG9naW4gQWRkcmVzcw==?=
Date: Sun, 31 Oct 2010 12:17:21 -0800
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="----=_NextPart_000_0212_01A56E64.1A0A1A10"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2900.5512
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5512
Content-Length: 4935

In the e-mail was also a 'link' to contact the billing and account services team but it looked a tad fishy to me when i moused over it as it had the word 'item' in the link mouseover.

Is this actually a valid Blizzard header and some hacker is trying to get my B.Net e-mail changed? Or is it that they have become more clever? A blue confirmation on which it is would be most appreciated. Oh and if it is a factual e-mail posting the billing and account services info for me so i can verify that link would be great too.