Hi I am using the code from rondebruin website, for mailing every worksheet with address in A1, but its doing nothing. When I run the macro, I don't get any errors but nothing at all happens. I have outlook 2013 open and I am using excel 2013. Does anyone have any ideas why it won't work?

Many thank

Sub Mail_Every_Worksheet()
'Working in Excel 2000-2016
'For Tips see: http://www.rondebruin.nl/win/winmail/Outlook/tips.htm
    Dim sh As Worksheet
    Dim wb As Workbook
    Dim FileExtStr As String
    Dim FileFormatNum As Long
    Dim TempFilePath As String
    Dim TempFileName As String
    Dim OutApp As Object
    Dim OutMail As Object

    TempFilePath = Environ$("temp") & ""
    If Val(Application.Version) < 12 Then
        'You use Excel 97-2003
        FileExtStr = ".xls": FileFormatNum = -4143
    Else
        'You use Excel 2007-2016
        FileExtStr = ".xlsm": FileFormatNum = 52
    End If
    With Application
        .ScreenUpdating = False
        .EnableEvents = False
    End With
    Set OutApp = CreateObject("Outlook.Application")
    For Each sh In ThisWorkbook.Worksheets
        If sh.Range("A1").Value Like "?*@?*.?*" Then
            sh.Copy
            Set wb = ActiveWorkbook
            TempFileName = "Sheet " & sh.Name & " of " _
                         & ThisWorkbook.Name & " " & Format(Now, "dd-mmm-yy h-mm-ss")
            Set OutMail = OutApp.CreateItem(0)
            With wb
                .SaveAs TempFilePath & TempFileName & FileExtStr, FileFormat:=FileFormatNum
                On Error Resume Next
                With OutMail
                    .to = sh.Range("A1").Value
                    .CC = ""
                    .BCC = ""
                    .Subject = "This is the Subject line"
                    .Body = "Hi there"
                    .Attachments.Add wb.FullName
                    'You can add other files also like this
                    '.Attachments.Add ("C:\test.txt")
                    .Send   'or use .Display
                End With
                On Error GoTo 0
                .Close savechanges:=False
            End With
            
            Set OutMail = Nothing
            Kill TempFilePath & TempFileName & FileExtStr
        End If
    Next sh
    Set OutApp = Nothing
    With Application
        .ScreenUpdating = True
        .EnableEvents = True
    End With
End Sub