Private WithEvents snItems As Items

Private Sub Application_Startup()
    Set snItems = Session.GetDefaultFolder(olFolderSentMail).Items
End Sub

Private Sub snItems_ItemAdd(ByVal item As Object)
    Dim CopiedItem As MailItem
    Dim ShareInbox As Outlook.MAPIFolder
    Dim MapiNameSpace As Outlook.NameSpace

    If TypeName(item) = "MailItem" Then

        Set MapiNameSpace = Application.GetNamespace("MAPI")
        Set ShareInbox = MapiNameSpace.Folders("Support").Folders("Send Mails")

        If item.SenderName = "Support" Then
            Set CopiedItem = item.Copy
            CopiedItem.UnRead = True
            CopiedItem.Move ShareInbox
        End If
    End If

    'MsgBox "Awesome"

ExitRoutine:
    Set ShareInbox = Nothing
    Set CopiedItem = Nothing
    Set MapiNameSpace = Nothing
End Sub

Set MapiNameSpace = Application.GetNamespace("MAPI")
Set ShareInbox = MapiNameSpace.Folders("Support").Folders("Gesendete Elemente")

If item.SenderName = "Support" Then
    item.Move ShareInbox
End If

Private Sub snItems_ItemAdd(ByVal item As Object)
    Dim CopiedItem As MailItem
    Dim ShareInbox As Outlook.MAPIFolder
    Dim MapiNameSpace As Outlook.NameSpace

    If TypeName(item) = "MailItem" Then

        Set MapiNameSpace = Application.GetNamespace("MAPI")
        Set ShareInbox = MapiNameSpace.Folders("Support").Folders("Send Mails")

        If item.SenderName = "Support" Then

            ' Turn off event handling
            Set snItems = Nothing

            Set CopiedItem = item.Copy
            CopiedItem.UnRead = True
            CopiedItem.Move ShareInbox

            ' Turn on event handling
            Set snItems = Session.GetDefaultFolder(olFolderSentMail).Items

        End If
    End If

ExitRoutine:
    Set ShareInbox = Nothing
    Set CopiedItem = Nothing
    Set MapiNameSpace = Nothing
End Sub