Para cada item na pasta Outlook VBA
Sub ListMailsInFolder()
Dim objNS As Outlook.NameSpace
Dim objFolder As Outlook.MAPIFolder
Set objNS = GetNamespace("MAPI")
Set objFolder = objNS.Folders.GetFirst ' folders of your current account
Set objFolder = objFolder.Folders("Foldername").Folders("Subfoldername")
For Each Item In objFolder.Items
If TypeName(Item) = "MailItem" Then
' ... do stuff here ...
Debug.Print Item.ConversationTopic
End If
Next
End Sub
Fancy Fish