Emails being compromized?

The situation is I have two attorney's in house and two attorney's outside counsel that are emailing each other. we are behind a company firewall, and using Norton symantec.

An email between the four attorney's was sent to one of the attorney's, cc'g the others, and the content was something about a 2 pm deadline for the def attorney who was not included ever on any of the conversation emails.

at 1:59 pm the def attorney sends his response to the four attorneys.

This is just one situation, but there have been multiple occasions very similar to this.

The outside counsel that we are working with, mentioned that this happened on another case they were working on with another set of attorneys, and the same def attorney.

Can this be coincendence? or is the def attorney possibly "listening" in on email conversations?
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Brenda DBusiness Systems AnalystAsked:
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NinjaStyle82Systems AdministratorCommented:
you might want to do a message tracking search to see if the email was actually sent to the outside attorney from your system.

http://exchangeserverpro.com/exchange-2010-message-tracking-log-search-powershell/

It is possible a weird forward rule or something is the culprit.

Also if you could get your hands on that email as an attachment from the outside guy, you can see where the message came from.
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Brenda DBusiness Systems AnalystAuthor Commented:
We have a barricuda system that logs all our emails that is sent inside and those that are sent out. There was none sent to the def attorney during the time frame.
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NinjaStyle82Systems AdministratorCommented:
can the outside counsel's firm verify the same from their end?
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Brenda DBusiness Systems AnalystAuthor Commented:
Not sure. I've not spoken with the outside firm that we are working with yet. My first concern is our office and computers, then once I've ruled out our side, will work on working with that group.

My thinking is that since they may have already been compromised, that somehow it's on their side. but I can't be sure. And before I go pointing fingers, I need to make sure its not on our side.
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NinjaStyle82Systems AdministratorCommented:
I would assume it's a weird mistake before any wrong doing. The def would be breaking the law if they somehow compromised your computers, then to make it obvious would be not very smart of them.
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Brenda DBusiness Systems AnalystAuthor Commented:
Agree. it's just strange that it's happened more than once, and at different locations.
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NinjaStyle82Systems AdministratorCommented:
Yeah, one of the commonalities is the counsel so I would bet it's on their end.
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Steve BottomsSr Network AdminCommented:
If all traffic is sent thru your Barracuda and the logs show that nobody in your firm sent the message to the defense counsel, then it didn't come from your mail system.  You have no control over who sends what outside your firm, so you'd need to get co-counsel's IT folks to check their own logs.  It's possible that someone outside your system has a rule set up for this particular case to sent mail copies somewhere... or a secretary CC'd without permission... or...  lots of possibilities.  If your logs are clear, then it didn't come from your system (assuming you trust your logs and Barracuda).
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Brenda DBusiness Systems AnalystAuthor Commented:
Thank you both NinjaStyle82 and SteveInNV. We've reviewed everyone's settings in house to make sure there's no rules distributing emails where they should be, so at least we know it's not our folks. Like you both said, not much we can do on the other persons end.

Thanks again.
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