Spoofed address still reported as 'Friend'

[mfrie01]

I sometimes receive spam that 'appears' to be from my address, but it's actually not. The Mailwasher 'From' column displays both my address and the spammer's, yet it still reports the email as from 'Friend.' If the program can tell the email is actually not from me, then why doesn't it act on that information? Here's the header of a recently received example copied from the MW Recycle Bin 'Source' tab:
Received: (qmail 4181 invoked by uid 30297); 28 May 2015 20:00:15 -0000
Received: from unknown (HELO p3plibsmtp01-12.prod.phx3.secureserver.net) ([72.167.238.228])
(envelope-sender <febri@gt-tires.com>)
by p3plsmtp06-04.prod.phx3.secureserver.net (qmail-1.03) with SMTP
for <michael@cowlesgraphicdesign.com>; 28 May 2015 20:00:15 -0000
Received: from 177-86-43-31.davoiisp.com.br ([177.86.43.31])
by p3plibsmtp01-12.prod.phx3.secureserver.net with bizsmtp
id ZY0E1q00o0gLzRd01Y0ESk; Thu, 28 May 2015 13:00:15 -0700
X-IP-SPAM: Suspect
Message-ID: <FABEED9F22A9CC50144735880366FABE@G0I2A1C1F>
From: "michael@cowlesgraphicdesign.com" <febri@gt-tires.com>
To: <michael@cowlesgraphicdesign.com>
Subject: Medstore
Date: 28 May 2015 12:29:04 -0400

[mfrie01]

I forgot to add that I want to be able to blacklist the spammer's address, but can't because I have to suspect that MW will be adding my own to the blacklist based on my comments above.

[TrustFire]

You may want to check out the graphic illustrations at the following link:--

http://forum.firetrust.com/viewtopic.ph ... dbc#p69542