freebsd stable - Dec 2005 - QUARANTINED: Mail System Error - Returned Mail

The message "Mail System Error - Returned Mail" from MAILER-DAEMON,
sent on 12/12/2005 15:55 was quarantined because it contained either an
executable file, a batch file or a screen saver file. All of these types of
attachments are considered security risks. Please consult your mail
administrator who can release the message.