MobileMe "mail returned" real or fake?

Question

I've had three of these in two days. Last time it occured, someone here told me they were fake. Seems like an odd form of SPAM but alright. Now it's started again, this time with my MobileMe account.
I recently migrated all my data to a new HD, something of a fresh start.
Tried to post message and Discussions complained of content not permitted. Maybe you can tell something from the copy that apears before the offensive word. (It appears to be trying to sell a male enhancement med.)
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
 [email protected]
   SMTP error from remote mail server after end of data:
   host 85.14.196.55 [85.14.196.55]: 550 5.7.1 Message rejected as spam by Content Filtering.
------ This is a copy of the message, including all the headers. ------
Return-path: <[email protected]>
Received: from [187.5.138.170] (helo=CAMERAS)
   by mx1.cs with esmtp (Exim 4.69 #1)
   id 1Q2qhv-00012D-Ow
   for <[email protected]>; Thu, 24 Mar 2011 21:00:36 +0100
Received: from [163.67.173.132] (HELO JYYA)
   by 187.5.138.170 (CommuniGate Pro SMTP 5.0.11)
   with SMTP id 40359272 for [email protected]; Thu, 24 Mar 2011 17:00:18 -0300
Message-ID: <01bd01cbea5e$19ad8a20$aa8a05bb@hgimc>
From: "pamsplace" <[email protected]>
To: <[email protected]>
Subject: vijaqqraa prof secures chic poytyency
Date: Thu, 24 Mar 2011 17:00:18 -0300
MIME-Version: 1.0
Content-Type: multipart/alternative;
   boundary="----=NextPart_000_01BA01CBEA44.F41C6B50"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2900.3792
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2479
XSpamScore: 7.3
XSpamReport: Spam detection software, running on the system "mx1.cs", has
   identified this incoming email as possible spam.  The original message
   has been attached to this so you can view it (if it isn't spam) or label
   similar future email.  If you have any questions, see
   the administrator of that system for details.
   Content preview:  bu warm mint:Chic free offers, sticky How are you my greetings
   my darling short: seek advice according viraqrav active pllls Grand 100%
   discounts wide-eyed rigidly... [...]
   Content analysis details:   (7.3 points, 7.0 required)
   pts rule name              description
   3.5 BAYES_99               BODY: Bayesian spam probability is 99 to 100%
   [score: 1.0000]
   0.6 SPF_SOFTFAIL           SPF: sender does not match SPF record (softfail)
   0.0 MIMEHTMLMOSTLY       BODY: Multipart message mostly text/html MIME
   0.0 HTML_MESSAGE           BODY: HTML included in message
   0.7 MPARTALTDIFF         BODY: HTML and text parts are different
   1.4 MIMEQP_LONGLINE      RAW: Quoted-printable line longer than 76 chars
   1.1 URIBLRHSDOB          Contains an URI of a new domain (Day Old Bread)
   [URIs: bravehost.com]

Answer 1

Your computer has nothing to do with it. Some computer, somewhere -- Bulgaria, let's say -- is sending out spam. The spam has your email address as the return address. Your address is just a string of text. They do not need access to your computer or your account or anything to do with you. The spammers might even have picked an address at random that just happens to match yours. Some of the spam messages bounce or are rejected by the addressee. Those bounced messages do not go back to Bulgaria. They go to the specified return address: your email account.