E-mail headers... did these come from the same person?

These are the headers from supposedly 2 different people using web-based e-mail services:

Code:

Delivered-To: ***********@gmail.com
Received: by 10.142.106.21 with SMTP id e21cs379826wfc;
        Wed, 1 Aug 2007 12:19:53 -0700 (PDT)
Received: by 10.100.3.20 with SMTP id 20mr651085anc.1185995992828;
        Wed, 01 Aug 2007 12:19:52 -0700 (PDT)
Return-Path: <************@yahoo.com>
Received: from web36711.mail.mud.yahoo.com (web36711.mail.mud.yahoo.com [209.191.85.45])
        by mx.google.com with SMTP id d19si1165865and.2007.08.01.12.19.51;
        Wed, 01 Aug 2007 12:19:52 -0700 (PDT)
Received-SPF: pass (google.com: domain of **************@yahoo.com designates 209.191.85.45 as permitted sender)
DomainKey-Status: good (test mode)
Received: (qmail 17242 invoked by uid 60001); 1 Aug 2007 19:19:51 -0000
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
  s=s1024; d=yahoo.com;
  h=X-YMail-OSG:Received:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID;
  b=Obp0H0wTiQXgsY83Xdg/vA2Zr5CUZVdQ00DsW7n/XmMQlJylhx64hOvFLAAO25kOgMnfILMjCbGyOjoFS1YUEk2km/q4a3K6kHkv/PHoRmjBp4fCdlfnP2mdmyGz2jHeZF1kMPNrUvUS/+kfZewFTszFraWVTGOE3sP8O9ysxjk=;
X-YMail-OSG: fH7ofbsVM1n_6u_90vfwRM6jCbGTT9XsGX3fwwnXe_hcIWn2zQK7.YUyNJHUm2zHUtC.ADxwekvRjtR7nDf6A5VhWuO2p_Nk6PPJ
Received: from [b][72.153.188.147][/b] by web36711.mail.mud.yahoo.com via HTTP; Wed, 01 Aug 2007 12:19:51 PDT

Code:

Delivered-To: *********@gmail.com
Received: by 10.142.106.21 with SMTP id e21cs365620wfc;
        Wed, 1 Aug 2007 09:05:44 -0700 (PDT)
Received: by 10.115.60.1 with SMTP id n1mr865406wak.1185984344889;
        Wed, 01 Aug 2007 09:05:44 -0700 (PDT)
Return-Path: <**********@msn.com>
Received: from bay0-omc1-s35.bay0.hotmail.com (bay0-omc1-s35.bay0.hotmail.com [65.54.246.107])
        by mx.google.com with ESMTP id m30si940795wag.2007.08.01.09.05.44;
        Wed, 01 Aug 2007 09:05:44 -0700 (PDT)
Received-SPF: pass (google.com: domain of **********@msn.com designates 65.54.246.107 as permitted sender)
Received: from BAY106-W25 ([65.54.161.125]) by bay0-omc1-s35.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.2668);
	 Wed, 1 Aug 2007 09:05:24 -0700
Message-ID: <BAY106-W2505F5C59CE26C550CC851AFE80@phx.gbl>
Content-Type: multipart/alternative;
	boundary="_9ab67ffb-a7b0-44e2-b196-d8c12fe48f4c_"
X-Originating-IP: [b][72.153.188.147][/b]

What do you guys think?

 

Yea I had seen that, thanks

But I mean, there's really no easy way to forge these headers right? Atleast not by someone who doesn't know much about this stuff?