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List:       ngw
Subject:    Re: [ngw] Mail loops - is Exchange better than GW?
From:       "Roger Thomas" <Roger.Thomas () lombardrisk ! com>
Date:       2008-08-29 20:55:41
Message-ID: 48B8703F.14C8.0015.1 () lombardrisk ! com
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Yes, there is a TID regarding this, any rule that has a condition will re-fire 
regardless of GW's anti mult-reply filtering.

This is normally see when someone creates an out of office reply and they 
set a condition to not to reply to certain type of messages. Instead of just
generating a single response to messages from another mail user until disabled, 
the rule will reply to each message sent from the other user.

Novell states that this is working as 'designed'. What is needed is a way to 
control this feature at the rule level or maybe even the system level.

Roger

>>> On 29/08/2008 at 19:55, in message <48B80DD0.8576.00A5.0@doc.state.nj.us>,
"Thomas Justice" <Thomas.Justice@doc.state.nj.us> wrote:
> If you craft a reply rule to involve more than a simple reply (IE subject 
> contains XXXXX), I think the one reply per sender limit breaks, and you can 
> have a loop on GW.
> 
> Tom Justice (Thomas.Justice@DOC.state.nj.us)
> OIT Network Services (Email Admin)
> 609-341-3027
> 
> 
>>>> "Lori Binner" <LBinner@JJKELLER.COM> 8/29/2008 2:51 PM >>>
> Bob-
> Thanks for taking the time to answer. I don't want to make this an Exchange 
> vs. GroupWise thing, but some of our users make it so. I simply want some 
> proof of what I think is still a possible problem with using this feature. 
> Yours is a perfect example. And, I'm also interested in proof that loops can 
> still happen in GroupWise as we have some upper management that is telling my 
> IT management they want this turned on, so I need examples/proof and can't 
> find much googling on the web (except for the obvious security reasons).  
> Thanks, Lori
> 
>>>> "Bob Jonkman" <bjonkman@sobac.com> 8/29/2008 1:29 PM >>>
> Any time an external mail server is involved it can remove or 
> obscure whatever tracking system the GW or Exchange system uses to 
> prevent mail loops.
> 
> While I can't offer you any proof or more detailed technical 
> information, the Exchange system (2007? 2003?) at a client site 
> recently suffered such an external mail loop, causing an out-of-
> diskspace condition and almost 24 hours of outage.  Fortunately, I'm 
> not there to manage their Exchange system, so I wasn't the one who 
> had to fix it.
> 
> --Bob.
> 
> 
> On 29 Aug 2008 at 12:13, Lori Binner wrote:
> 
>> Hello-
>> Can anyone provide proof that mail loops don't occur with Exchange?
>> Or, also that there is NO chance today that a loop will occur with
>> GroupWise? Users here continually see that other external users are
>> using out of office rules and regularly the statement is made that
>> "Exchange can do this without causing an undetected loop" as some have
>> come from other companies with Exchange. Using out of the office rules
>> are very important to our users, including sales users, and this issue
>> is seen here as possibly one huge reason to possibly migrate from GW
>> to Exchange.
>> 
>> A few years back, we experienced a mail loop with individual's
>> out-of-office rules and this resulted in their mailboxes being
>> unusable for a week while we cleaned them of the thousands of emails.
>> At that time, we put an end to external replies as we didn't want to
>> risk the chance that this problem, if went undetected, could cause ANY
>> downtime of our company's email system.
>> 
>> I realize over the last few years, that GroupWise has been greatly
>> improved to lessen the chances of loops occurring, and we've allowed
>> the rules to now be used internally but not externally. Every so often
>> I still see mention by others that they've experienced some type of
>> mail loop, and we (IT) have made the decision that even the smallest
>> chance a loop could happen was not worth the risk of any down-time to
>> our company's email system.
>> 
>> If anyone can share any insight/experience on this, it would be
>> greatly appreciated.  Thanks.
>> 
>> 
>> 
>> 
>> 
> 
> 
> -- -- -- --
> Bob Jonkman <bjonkman@sobac.com>         http://sobac.com/sobac/ 
> SOBAC Microcomputer Services              Voice: +1-519-669-0388
> 6 James Street, Elmira ON  Canada  N3B 1L5  Cel: +1-519-635-9413
> Software   ---   Office & Business Automation   ---   Consulting
> 
> 
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