gmail va a su bola

[juanito1712]

trato de mandar un email a una direccion de correo que si que existe desde gmail y ocurre esto

Delivery to the following recipient failed permanently:

[email protected]

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550-5.1.1 The email account that you tried to reach does not exist. Please try
550-5.1.1 double-checking the recipient's email address for typos or
550-5.1.1 unnecessary spaces. Learn more at
550 5.1.1 http://mail.google.com/support/bin/a...py?answer=6596 l9si79755844pbi.228 (state 14).

----- Original message -----

MIME-Version: 1.0
Received: by 10.68.73.8 with SMTP id h8mr55043785pbv.109.1326237500139; Tue,
10 Jan 2012 15:18:20 -0800 (PST)
Sender: [email protected]
Received: by 10.68.33.74 with HTTP; Tue, 10 Jan 2012 15:18:20 -0800 (PST)
Date: Wed, 11 Jan 2012 00:18:20 +0100
X-Google-Sender-Auth: 1_PuPCoPN079YUsLYlz4PisVjx8
Message-ID: <[email protected]. com>
Subject: aosiuhouihfouid
From: "floppy.es" <[email protected]>
To: [email protected]
Content-Type: multipart/alternative; boundary=bcaec5469629156a9504b634bbfd

en cambio los mando desde hotmail y va perfecto...

el correo de destino es una cuenta de un dominio mio, alguna suerencia de por donde empezar?