Jamie
I fixed the file as you said and now it seems to be closer.
I now get a
... while talking to xxx.xxx.usyd.edu.au.:
<blockquote>>> MAIL From:<mailto:webmaster@xxx.usyd.edu.au>
</blockquote>
<<< 550 5.0.0 Access denied
554 5.0.0 Service unavailable
I assume that it is because the admin of the may have not given me access.