Returned mail: see transcript for details

The original message was received at Sun, 18 Nov 2007 14:43:24 +0600
from [203.190.0.177]

   ----- The following addresses had permanent fatal errors -----
<wesbao_at_worldnet.att.net>
    (reason: 550-203.190.0.180 blocked by ldap:ou=rblmx,dc=worldnet,dc=att,dc=net)

   ----- Transcript of session follows -----
... while talking to gateway2.worldnet.att.net.:
>>> MAIL From:<gpe_at_handhelds.org> SIZE=40769
<<< 550-203.190.0.180 blocked by ldap:ou=rblmx,dc=worldnet,dc=att,dc=net
<<< 550 Blocked for abuse. See http://www.att.net/general-info/rblinquiry.html"
554 5.0.0 Service unavailable

attached mail follows:

This message was undeliverable due to the following reason:

Your message could not be delivered because the destination computer was
unreachable within the allowed queue period. The amount of time
a message is queued before it is returned depends on local configura-
tion parameters.

Most likely there is a network problem that prevented delivery, but
it is also possible that the computer is turned off, or does not
have a mail system running right now.

Your message could not be delivered within 8 days:
Mail server 138.248.243.159 is not responding.

The following recipients could not receive this message:
<wesbao_at_worldnet.att.net>

Please reply to postmaster_at_worldnet.att.net
if you feel this message to be in error.