Exchange Server 2003 "Lost" emails

We use GFI Mail Essentials. According to it mail for the previous 10 hours was coming in to the server but was not showing up in users mailboxes. GFI kind of threw their hands up and pointed the finger at Microsoft. I finally had to break down and restore the OS from backup. Not the data partition (which holds Exchange). It fixed the problem and mail started being put in mailboxes again.  Would anyone have any idea where these 10 hours worth of emails went if they actually did come in to the server but were not put in users mailboxes?
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LockDown32OwnerAsked:
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Scott CSenior Systems EnginerCommented:
If they really came into the server but not delivered to the mailboxes, they'd be in the transaction files.

Here is how to find where the transaction logs are located.

https://support.microsoft.com/en-us/kb/821915

If the mail is not in the transaction log files, it didn't come in and unless the email was spooled somewhere else the messages are gone for good.

You really need to migrate off of Exchange 2003.  It is no longer supported and if you have an issue that requires MS support, you won't get any help unless you already have an existing CSA.
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LockDown32OwnerAuthor Commented:
Thanks Scoot. I'll give you my customer's phone number. Maybe he will listen to you because he doesn't listed to me :) If they were in the transaction log files they would have been distributed to the mailboxes when the server came back up would they? The data directed (MDBDATA) didn't change or get restored. Just the OS.
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Scott CSenior Systems EnginerCommented:
I hear you.  6 weeks ago I was working for MS as a Tier 3 Exchange Engineer and would have told them just that.  

Yes, if they were in the transaction logs they would have played back when the server came back online.  

What probably happened was when whatever happened to your server happened, GFI kept pushing the emails regardless of where they went.

Where I'm working now we have a Symantec system and if the server can't accept emails due to backpressure or some other reason, the mail is simply gone.

I had a case earlier this week where exactly that happened.  Diskspace ran out, backpressure kicked in and email just went nowhere.

It happens.  Email isn't as robust as most people think.
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