You can use your Telkom local only to e-mail via Outlook, provided your using your Telkom provided email address, or another local hosted one (like webmail, I'm sure you can configure Outlook to use it.)
but I know that doesn't work, 'cos I had problems and had to phone them and ask. Consultant gave me a whole run-around getting me to check this and that when I knew exactly what I wanted. Oh well, at least they were helpfull.
You'll have to call them or search the forums, unless someone else knows...