--Send anonymous FREE EMAIL:
https://anonymousemail.me/
It's mostly for the ip that can be seen as sender since that web asks for a source address mail.
Te piden escribir una dirección de correo como fuente del envio por lo que lo que anonim... anonimiza es más bien la ip de origen del envío del correo electrónico.
Eso si, como todo lo que pasa por servidores desconocidos no se te ocurra enviar uan contraseña por este método :-P
http://www.sendanonymousemail.net/
http://www.sendanonymousemail.net/send.php
"An anonymous remailer is a server computer which receives messages with
embedded instructions on where to send them next, and which forwards
them without revealing where they originally came from.
There are Cypherpunk anonymous remailers, Mixmaster anonymous
remailers, and anonymous servers, among others which differ in how they
work, in the policies they adopt, and in the type of attack on anonymity
of email they can (or are intended to)
resist.
"
--Send anonymous FREE SMS:
http://www.sendanonymoussms.com/
--Send anonymous FREE EFAX:
http://www.sendfaxinternet.com/