Maybe something like the following Outlook macro, which will give you an Excel compatible CSV file that gives the current state of play.
Option Explicit
Sub IsAnswered()
'Graham Mayor - www.gmayor.com
'Change the path as appropriate
Const strMasterPath As String = "C:\Path\Today's Messages.csv"
Dim olItem As MailItem
Dim oFSO As Object
Dim oFile As Object
Dim strLine As String
Dim sReplySent As String
MsgBox "Please wait until 'Processed Finished' message"
Set oFSO = CreateObject("Scripting.FileSystemObject")
Set oFile = oFSO.OpenTextFile(strMasterPath, 8, True, 0)
For Each olItem In Session.GetDefaultFolder(olFolderInbox).Items
If Format(olItem.ReceivedTime, "yyyymmdd") = Format(Date, "yyyymmdd") Then
If olItem.PropertyAccessor.GetProperty("http://schemas.microsoft.com/mapi/proptag/0x10810003") = 0 Then
sReplySent = "REPLY OUTSTANDING"
Else
sReplySent = ""
End If
strLine = Format(olItem.ReceivedTime, "yyyymmdd") & Chr(44) & _
Format(olItem.ReceivedTime, "HH:MM") & Chr(44) & _
olItem.SenderEmailAddress & Chr(44) & _
olItem.subject & Chr(44) & sReplySent
oFile.Write strLine & vbCrLf
End If
DoEvents
Next olItem
oFile.Close
MsgBox "Process Finished"
lbl_Exit:
Set oFSO = Nothing
Set oFile = Nothing
Exit Sub
End Sub