Ok, i did some more research.
The following email _WORKS_:
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From: Removed <removed@hotmail.com>
To: Removedl <removed@gardiol.org>
Subject: RE: Prova...
Date: Fri, 25 Sep 2009 09:50:04 +0000
Importance: Normal
In-Reply-To: <e0e827b0b04e422d9c7743a9a19a13a4@127.0.0.1>
References: <e0e827b0b04e422d9c7743a9a19a13a4@127.0.0.1>
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Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
prova=20
=20
> Date: Fri=2C 25 Sep 2009 11:22:21 +0200
> Subject: Prova...
>=20
>=20
> Quando puoi=2C rispondi a questa...
>=20
>=20
=0A=
_________________________________________________________________=0A=
Condividi e organizza le tue immagini con Windows Live Foto.
=0A=
http://www.microsoft.com/windows/windowslive/photos.aspx =
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Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<html>
<head>
<style><!--
.hmmessage P
{
margin:0px=3B
padding:0px
}
body.hmmessage
{
font-size: 10pt=3B
font-family:Verdana
}
--></style>
</head>
<body class=3D'hmmessage'>
prova =3B<BR> =3B<BR>>=3B Date: Fri=2C 25 Sep 2009 11:22:21 +0200=
<BR>>=3B From: =
com<BR>>=3B Subject: Prova...<BR>>=3B <BR>>=3B <BR>>=3B Quando puoi=
=2C rispondi a questa...<BR>>=3B <BR>>=3B <BR> <br /><hr />L=
ive Search Map <a href=3D'http://maps.live.it' target=3D'_new'>Cerchi la st=
rada pi=F9 breve per andare in ufficio? Chiedila a Live Search Maps!</a></b=
ody>
</html>=
--_606aa0d7-dd39-4241-94e4-53b6b9080048_--
What i did was to REPLY to this email... then my girlfriend answered and BANG, the answer is blank in roundcube...
Something must have changed between my reply and her reply.