Can't get senders email address from read receipts - powershell

Question

I am using the code posted on here to try and retrieve the senders email address form read receipts in PowerShell. For some emails this works OK but for others it does not work.
In Outlook I can clearly see who it's from, but PowerShell returns a blank cell.
Any help please?
function Get-OutlookInBox {
Add-Type -AssemblyName "Microsoft.Office.Interop.Outlook" | Out-Null
$olFolders = "Microsoft.Office.Interop.Outlook.olDefaultFolders" -as [type]
$Outlook = New-Object -ComObject Outlook.Application
$Namespace = $Outlook.GetNameSpace("MAPI")
$folder = $NameSpace.pickfolder()
$Folder.Items | Get-Member
$Folder.Items |
Select-Object Subject, SenderName, SenderEmailAddress, CreationTime,
ReceivedTime, Final-recipient, UserProperties, ItemProperties,
MAPIOBJECT, ReceivedByName, Recipents, Sender, SentOn,
SentOnBehalfOfName |
Export-CSV -NoTypeInformation xxx\Trial.csv
}

Answer 1

First of all, make sure that specified exist and can't be retrieved for a particular object. For example, I have noticed the Final-recipient which doesn't have any corresponding property in the OOM.
Note, you need to iterate over all items in the folder and deal with mail items only because other Outlook items may not have properties specified to export. So, you may check the Class property before doing anything.
A yet better solution is to use the Find/FindNext or Restrict methods of the Items class to get items that correspond to your conditions. Read more about these methods in the following articles:
How To: Use Find and FindNext methods to retrieve Outlook mail items from a folder (C#, VB.NET)
How To: Use Restrict method to retrieve Outlook mail items from a folder