[Libreoffice] Undelivered Mail Returned to Sender

This is the Postfix program at host smtp-in-165.livemail.co.uk.

I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.

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 message returned below.

                        The Postfix program

<pat.nicholls@ntlworld.com>: host aspmx.l.google.com[74.125.77.27] said:
    552-5.7.0 Our system detected an illegal attachment on your message. Please
    552-5.7.0 visit http://mail.google.com/support/bin/answer.py?answer=6590 to
    552 5.7.0 review our attachment guidelines. w12si11019174eeh.29 (in reply
    to end of DATA command)

Reporting-MTA: dns; smtp-in-165.livemail.co.uk
X-Postfix-Queue-ID: 125E4EB00B9
X-Postfix-Sender: rfc822; libreoffice@lists.freedesktop.org
Arrival-Date: Mon, 18 Apr 2011 02:03:19 +0100 (BST)

Final-Recipient: rfc822; pat.nicholls@ntlworld.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host aspmx.l.google.com[74.125.77.27] said:
    552-5.7.0 Our system detected an illegal attachment on your message. Please
    552-5.7.0 visit http://mail.google.com/support/bin/answer.py?answer=6590 to
    552 5.7.0 review our attachment guidelines. w12si11019174eeh.29 (in reply
    to end of DATA command)

--- Begin Message ---

• libreoffice -AT- lists.freedesktop.org
• Mon, 18 Apr 2011 10:09:10 +0900

The message was undeliverable due to the following reason(s):

Your message was not delivered because the destination server was
not reachable 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 6 days:
Host 164.42.226.143 is not responding.

The following recipients could not receive this message:
<pat@patandannie.co.uk>

Please reply to postmaster@lists.freedesktop.org
if you feel this message to be in error.

Attachment: message.zip
Description: Binary data

--- End Message ---