- A virtual community of network engineers
 Home  BookStore  StudyNotes  Links  Archives  StudyRooms  HelpWanted  Discounts  Login
GroupStudy List Circuit Breakers posted 11/25/2002
[Chronological Index] [Thread Index] [Top] [Date Prev][Date Next] [Thread Prev][Thread Next]

Hi Everyone,


The GroupStudy CCIE Lab list circuit breakers fired probably late Friday
night.  This was caused because someone on Road Runner is feeding all
messages from late October-November back to the list.  Because of the
filtering software we use, the looped message should have been filtered
and not made it to the list.  But if you were included in the message as
for example a cc: to a response, you will receive the duplicate.
Because it is being sent from Road Runner direct to your account, there
is no way for me to filter it.  I have attached a header to an e-mail
that is being looped to show how it happens.


This attack from RoadRunner did cause the list circuit breakers to fire,
thus denying any messages since Saturday morning.  The way I designed
GroupStudy is I have the list shutdown if it senses anything unusual.
This is to prevent the alternative which is 1000's of e-mails being sent
out because of a mail-bomb or loop.


I have found 26 or so messages that have been blocked.   I have tried to
resend those messages.  If you do not see your message come across in
the next hour or so, please resend.


I apologize for the inconvenience.


Paul Borghese





Header of looped message:


This message was originally sent on October 12 and looped from Road


Received: from ( [])

        by (8.9.3/8.9.3) with ESMTP id AAA05417

        GroupStudy Mailer; Sun, 24 Nov 2002 00:15:31 GMT

Received: from ( [])

        by (8.12.5/8.12.2) with ESMTP id


        Sat, 23 Nov 2002 15:32:06 -0500 (EST)

Received: from mail pickup service by with Microsoft


         Sat, 23 Nov 2002 14:34:47 -0600

Received: from ([]) by

    with Microsoft SMTPSVC(5.5.1877.447.44);

         Sat, 12 Oct 2002 14:17:18 -0500

Received: from ( [])

        by (8.12.5/8.12.5) with ESMTP id

        Sat, 12 Oct 2002 15:16:57 -0400 (EDT)

Received: from localhost (mail@xxxxxxxxx)

        by (8.9.3/8.9.3) with SMTP id TAA14136;

        Sat, 12 Oct 2002 19:16:35 GMT