spam desde mi propia cuenta, que está pasando?

he recibido mensajes de spam desde mi propia cuenta, la actividad de la misma
(que se puede consultar de manera simplificada) coincide con las veces que me
he logeado. Dejo la cabecera del mensaje, cualquier comentario sera
agradecido:

Delivered-To: edu.bit.es@gmail.com
Received: by 10.216.72.133 with SMTP id t5cs11393wed;
Sat, 2 May 2009 09:14:36 -0700 (PDT)
Received: by 10.151.139.9 with SMTP id r9mr8045443ybn.184.1241280875401;
Sat, 02 May 2009 09:14:35 -0700 (PDT)
Return-Path: <edu.bit.es@gmail.com>
Received: from bl4-212-194.dsl.telepac.pt (bl4-212-194.dsl.telepac.pt
[81.193.212.194])
by mx.google.com with SMTP id 2si11597048gxk.32.2009.05.02.09.14.30;
Sat, 02 May 2009 09:14:35 -0700 (PDT)
Received-SPF: neutral (google.com: 81.193.212.194 is neither permitted nor
denied by domain of edu.bit.es@gmail.com) client-ip.193.212.194;
Authentication-Results: mx.google.com; spf=neutral (google.com:
81.193.212.194 is neither permitted nor denied by domain of
edu.bit.es@gmail.com) smtp.mail=edu.bit.es@gmail.com
Date: Sat, 02 May 2009 09:14:35 -0700 (PDT)
Message-Id: <49fc716b.020bca0a.1518.ffffd9f0SMTPIN_ADDED@mx.google.com>
To: edu.bit.es@gmail.com
Subject: La crisis ha acabado, Trabajen con nosotros!
From: edu.bit.es@gmail.com
MIME-Version: 1.0
Importance: High

gracias...