[Postfix-es] 550 5.7.1 Blocked , Postfix admin

[d.vargas en xserver.cl]

Saludos desde chile,
configure un servidor con el posftix admin, todo bien, pero a algunos ISP
no les gusto mi configuración parece porque me rebotan los correos.

A alguien le ha pasado? como lo soluciono?

de antemano muchas gracias.

Daniel V.
:)


This is the Postfix program at host mail.xxxxxx.cl.

I'm sorry to have to inform you that your message could not be
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The Postfix program

<eq_informatica en entelchile.net>: host mail.entelchile.net[164.77.62.8] said:
    550 5.7.1  Blocked, see http://www.spamhaus.org:
    eq_informatica en entelchile.net (in reply to RCPT TO command)