How to troubleshoot time stamp email delay issues in Exchange


I have a manager who claimed he sent an email to a staff this past Monday 1/4 and he has the email in Sent Items to validate this.  On the staff's computer, the same email show the sent time was this morning Wednesday 1/6.  

Any one has any idea how to troubleshoot this?  All my queues in Exchange are empty so I don't know how to go from here.  Please advice.

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The time stamps on the emails depend on the local system time. Please check the system times of both the users.

zrsystemsAuthor Commented:
The time stamps are correct on both computers.  Furthermore, I believe the manager did sent the email this past Monday 2/4 (sorry, should be the month of February, not January).

What is the time-stamp it is showing on the email of the recipient whether it is showing the sending time or the receiving time?
zrsystemsAuthor Commented:
it's showing the sent time.  see below.

From: Yony XXX
Sent: Wednesday, February 06, 2008 9:42 AM
To: Mily XXX
Cc: Candy XXX
Subject: Emailing: Parent 01.31.08

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