**The message you sent has been blocked by our SPAM filter**

[CIFN-SPAM filter]

Your message to: loopback at xxxxxxxxxxxx
has triggered our SpamAssassin SPAM filters and has been REJECTED. 
The email you sent with the following subject has NOT BEEN DELIVERED:

Subject: E-mail account security warning.

Our company uses a set of email filters to help block the delivery of 
unsolicited commercial email, otherwise known as SPAM. For more 
information on SPAM, please visit http://spam.abuse.net.

If you believe that you have received this message in error, please 
accept our sincere apologies. We ask that you please reply to this 
email message. When we receive your reply, we will add your email 
address to our list of approved senders so that in the future 
we can avoid making this mistake again. Please note that this is a 
manual process and is only done during business hours.

In your reply, please include a line or two telling us to add 
you to our list of approved senders, so we will know you really 
answered this message instead of a computer program.

The report below will help you determine why your message was flagged 
as SPAM.   If you continue to have problems, please contact our 
Helpdesk at +52 (777) 313 2063.

Thank you very much,
Postmaster



SpamAssassin report:
Spam detection software, running on the system "uxmal.cifn.unam.mx", 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 block
similar future email.  If you have any questions, see
the people in charge of spam mail for details.

Content preview:  Hello user of Unam.mx e-mail server, Your e-mail
  account will be disabled because of improper using in next three days,
  if you are still wishing to use it, please, resign your account
  information. For more information see the attached file. [...] 

Content analysis details:   (0.1 points, 5.0 required)

 pts rule name              description
---- ---------------------- --------------------------------------------------
 0.1 NO_REAL_NAME           From: does not include a real name
-0.0 BAYES_40               BODY: Bayesian spam probability is 40 to 44%
                            [score: 0.4116]
Reporting-MTA: dns; uxmal
Arrival-Date: Thu,  4 Mar 2004 22:13:46 -0600 (CST)

Final-Recipient: rfc822; loopback at cifn.unam.mx
Action: failed
Status: 5.7.1
Diagnostic-Code: smtp; 550 5.7.1 Message content rejected, UBE, id=XXSTYapg
Last-Attempt-Date: Thu,  4 Mar 2004 22:13:46 -0600 (CST)
Date: Wed, 03 Mar 2004 23:26:16 -0500
Subject: E-mail account security warning.
From: support at xxxxxxx
Message-ID: <vrtfjakgbrwoppfwudo at xxxxxxxxxxxx>
MIME-Version: 1.0
Content-Type: multipart/mixed;
        boundary="--------paacknyxbucwkgiqnqfr"