Exchange 2007 - Internal to Internal emails intermittently delayed

We're running Outlook 2003 on Exchange Server 2007, Windows Server 2003. I recently have encountered a problem where emails to one internal user (User A) have been delayed. The most recent example is that User B sent an email to 2 recipients, one external and the previously mentioned internal user (User A) on 11/05/08. The external user received and replied to the email the same day. User A just received the same email around 7:30am this morning (11/13/08), but date-stamped as if User B had just sent it this morning.

I checked Message Tracking and Exchange says the email was delivered to User A on the day it was sent. It just didn't show up in his inbox until a week later. Any thoughts on where to look from here? (User A is our company CEO, naturally.)
TFSCRamseyAsked:
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marques_salazarCommented:
Could it possibly be the way he is viewing his folders in Outlook?  (i.e.  All messages instead of sort by group, etc.)
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florin_sCommented:
and you could also use this tool TCPView to monitor internal connections:

http://technet.microsoft.com/en-us/library/bb124076.aspx
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TFSCRamseyAuthor Commented:
It's the date-stamp that's really making me scratch my head. I would have thought if it was a delay on his machine, the date-stamp would still be correct.
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florin_sCommented:
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TFSCRamseyAuthor Commented:
Turns out he received it when he was originally supposed to, but the sender accidentally resent it. ::groan:: Thanks for your help.
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