Con 7 bits, expandiendo sólo los códigos mayores de 128:
Received: (from joaquin@localhost) by colibri.dit.upm.es... Date: Tue, 7 Jan 1997 12:50:37 +0100 From: Joaquin Seoane <joaquin@dit.upm.es> Message-Id: <199701071150.MAA02005@colibri.dit.upm.es> Subject: =?ISO-8859-1?Q?A=F1o_nuevo=2C_vida_nueva=2E?= MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Feliz a=F1o 1997.