I'm frequently asked how to display the recipient's email address in the Sent Items folder. The answer is this macro, which adds a custom field containing the addresses the message was sent to. The custom address field is a text field and you can sort or group by it.

Note that when a message is sent to multiple people, all addresses will be entered in the field as one long string, as seen in this example.

/o=ExchangeLabs/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=43dfb970e3b54f85942d1348b58581e6-drcp;billy@domain.net;

Exchange server addresses are the x.500 address (as seen in the example above), not the SMTP address, however, you can use the Right() function to keep just the alias.

Public Sub GetRecipientAddress()
'http://slipstick.me/9vjgj
    Dim currentExplorer As Explorer
    Dim Selection As Selection
    Dim obj, objMail As Object
    Dim objProp As Outlook.UserProperty
    Dim strDomain
    Dim Recipients As Outlook.Recipients
    Dim recip As String
    Dim i
    Dim prompt As String
     
    Set currentExplorer = Application.ActiveExplorer
    Set Selection = currentExplorer.Selection
 
    On Error Resume Next
 
For Each obj In Selection
         Set objMail = obj
         strDomain = ""
Set Recipients = objMail.Recipients
  For i = Recipients.count To 1 Step -1
     recip$ = Recipients.item(i).Address
     
   ' To use only the alias from the x.500 address
 ' Exchange online
    'If InStr(1, LCase(recip), "/ou=") Then recip = Right(recip, Len(recip) - InStr(1, LCase(recip), "-"))
    ' on prem
    'If InStr(1, LCase(recip), "/ou=") Then recip = Right(recip, Len(recip) - InStr(1, LCase(recip), "recipients") - 13)

' Use semicolon separator if there is more than 1 address
     If i = 1 Then
         strDomain = strDomain & recip
     Else
         strDomain = strDomain & recip & "; "
     End If

  Next i
     Debug.Print strDomain
    ' Msgbox strDomain
  
         Set objProp = objMail.UserProperties.Add("Recipient Email", olText, True)
         objProp.Value = strDomain
         objMail.Save
  
        Err.Clear
    Next
  
    Set currentExplorer = Nothing
    Set obj = Nothing
    Set Selection = Nothing
End Sub

To write the address list to a new message for easy reading, replace the Set objProp = to objMail.Save lines with the following:

Set objMsg = Application.CreateItem(olMailItem)

 With objMsg
  .Body = strDomain
  .Display
End With

Add the field automatically

To add the recipient address field automatically, you need to use an ItemAdd macro. These macros need to be in ThisOutlookSession. To test, click in the Application_Startup macro and click Run then send a message.

Dim WithEvents olSent As Items
  
Private Sub Application_Startup()
   Dim NS As Outlook.NameSpace
   Set NS = Application.GetNamespace("MAPI")
   Set olSent = NS.GetDefaultFolder(olFolderSentMail).Items
   Set NS = Nothing
End Sub
  
Private Sub olSent_ItemAdd(ByVal Item As Object)
    ' Fromhttp://slipstick.me/1
    Dim objProp As Outlook.UserProperty
    Dim strDomain As String
    Dim Recipients As Outlook.Recipients
    Dim recip As String 'Outlook.Recipient
    Dim i
                   
strDomain = ""
Set Recipients = Item.Recipients
  For i = Recipients.count To 1 Step -1
     recip$ = Recipients.Item(i).Address
    ' Exchange online
    'If InStr(1, LCase(recip), "/ou=") Then recip = Right(recip, Len(recip) - InStr(1, LCase(recip), "-"))
    ' on prem
    'If InStr(1, LCase(recip), "/ou=") Then recip = Right(recip, Len(recip) - InStr(1, LCase(recip), "recipients") - 13)
     If i = 1 Then
         strDomain = strDomain & recip
     Else
         strDomain = strDomain & recip & "; "
     End If
  Next i
      
  Set objProp = Item.UserProperties.Add("Recipient Email", olText, True)
    objProp.Value = strDomain
    Item.Save
  
    Err.Clear
         
    Set objProp = Nothing
    Set Recipients = Nothing
         
 End Sub

How to use this macro

First: You will need macro security set to low during testing.

To check your macro security in Outlook 2010 or 2013, go to File, Options, Trust Center and open Trust Center Settings, and change the Macro Settings. In Outlook 2007 and older, it’s at Tools, Macro Security.

After you test the macro and see that it works, you can either leave macro security set to low or sign the macro.

Open the VBA Editor by pressing Alt+F11 on your keyboard.

To put the code in a module:

1. Right click on Project1 and choose Insert > Module
2. Copy and paste the macro into the new module.

More information as well as screenshots are at How to use the VBA Editor