Excel has a feature built-in that will allow you send the workbook, which I don't think you want. You just want to send a "note" that it's been saved. If so, you'll have to use VBA.
If you use VBA, there's a pseudo-cheating way that uses the Excel send feature to send a new (and therefore smaller than your public book) to the recipients. With this method, you could put a short message in the "Subject". Since you didn't mention which email program you're using, I wanted to try to find a non-Outlook solution.
If you use Outlook, you could have the workbook "reference" Outlook and use Outlook to send a short email with whatever you want to say.
Here's the code for the first solution which needs to be placed in the "ThisWorkbook" module in the VBA editor (if you don't know how to do this, post again and I'll give you more detailed instructions).:
Private Sub Workbook_BeforeSave(ByVal SaveAsUI As Boolean, Cancel As Boolean)
'fakeBook is the book that will be sent, it's just
'a blank workbook
Dim fakeBook As Workbook
'asks the user if they want to save and send email
response = MsgBox("Do you want to save and send email notification", vbYesNo)
'if they answer no, then abort save
If response = vbNo Then
Cancel = True
Else
'create the fake workbook
Set fakeBook = Workbooks.Add
'send to recipient with msg in subj line
fakeBook.SendMail "yourrecipient@whereever.com", Me.Name & " has been changed and saved."
'close the fake workbook
fakeBook.Close savechanges:=False
End If
End Sub
If you have any questions, please post again.
HTH,
Scott