I am answering this question because I’ve recieved so many spoof/spam messages lately to my email address(es) at me.com.
I decided to find out how to report them; here’s what I found out:
Suspicious email messages can be forwarded to one of the following;
Make sure to include the long header. Long headers can be displayed using the menubar (see below)

Then either copy & paste the long header or simply forward the entire message.
Example of long header from a suspicious email:
“From: Kikki Howard <noreply@hakahakajkfbczj.googlemoogl.tk>
Subject: Kiss to you
Date: June 9, 2013 4:21:21 PM PDT
To:
xxxxx@me.com
Return-Path: <noreply@hakahakajkfbczj.googlemoogl.tk>
Received: from nk11p00mm-smtpin004.mac.com ([xx.xxx.xxx.xxx]) by ms04574.mac.com (Oracle Communications Messaging Server 7u4-26.01(7.0.4.26.0) 64bit (built Jul 13 2012)) with ESMTP id <0MO5001Y5FJL6NL0@ms04574.mac.com> for xxxxx@me.com; Sun, 09 Jun 2013 23:21:21 +0000 (GMT)
Received: from hakahakajkfbczj.googlemoogl.tk ([91.191.18.62]) by nk11p00mm-smtpin004.mac.com (Oracle Communications Messaging Server 7u4-27.05(7.0.4.27.4) 64bit (built Apr 23 2013)) with SMTP id <0MO50002UFJJV0G0@nk11p00mm-smtpin004.mac.com> for xxxxx@me.com (ORCPT xxxxx@me.com); Sun, 09 Jun 2013 23:21:21 +0000 (GMT)
Received: from nwk-txn-msbadger0204.apple.com (nwk-txn-msbadger0204.apple.com. [xx.xxx.x.xx]) by xx.xxx.x.xx with HTTP; Mon, 10 Jun 2013 01:21:21 +0200
Original-Recipient: rfc822;xxxxx@me.com
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.10.8626,1.0.431,0.0.0000 definitions=2013-06-09_07:2013-06-08,2013-06-09,1970-01-01 signatures=0
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=14 phishscore=0 bulkscore=53 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=6.0.2-1305010000 definitions=main-1306090279
Dkim-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hakahakajkfbczj.googlemoogl.tk; s=hakahakajkfbczj; h=from:subject:date:to:content-type; bh=tL+/wJmQOT1qfRAmSggBixqXyEIqt839Zb4SbOAPNOM=; b=…lggV4PzuGc/TkDUNdlU=;
Message-Id: <0D66EC23-70A1-D480-7514-D280D76FF040@apple.com>
Mime-Version: 1.0 (Apple Message framework v936)
Content-Type: multipart/mixed; boundary="-4277442969-183115831-7904244676=:70228 ”
You can find more info at: