Estos son los dos mensajes que he recibido de respuesta el primero es de hotmail y el segundo es de otro correo
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients failed.
> -----Missatge original-----
> De: MAILER-DAEMON@mail74103.nsprimario.com
> [mailto:MAILER-DAEMON@mail74103.nsprimario.com]
> Enviat: dilluns, 13 / juny / 2011 13:35
> Tema: failure notice
>
> Hi. This is the qmail-send program at mail74103.nsprimario.com.
> I'm afraid I wasn't able to deliver your message to the following addresses.
> This is a permanent error; I've given up. Sorry it didn't work out.
>
> xx.xxx.xx.xxx does not like recipient.
> Remote host said: 550 sorry, no mailbox here by that name. (#5.7.17)
> Giving up on xx.xxx.xx.xxx
¿Que os parece?
Saludos,