Sorry you are having this problem,
Sounds to me like your eMail client configuration is incorrect...
Is this a new problem where you were able to send an receive mail no problem before and now this ?
I suspect it is a new set-up.
It looks like you entered your eMail address where the software was asking for the address of the SMTP mail server...
Port 465 is for a secure SMTP Server.
Normally, the SMTP server port is 25 or 26.
Have you modified your eMail settings lately ?
Or maybe it works well from home but not when you are on another network....
Bigpond has implemented some security on their network, see here:
So, when you are connected to the bigpond network, you must use their SMTP server:
Otherwise, it will reject the connection.
When you are away from the bigpond network, you might have to ask your host or whoever, who provides the highspeed internet access ?
and then google for their smtp server,
securenet.net smtp server
earthlink smtp server
you will quickly and easily find this server and all you have to do is enter it temporarily into your SMTP server field in your eMail client settings
making sure to set it back to bigpond once you are back home..
THis should get you back on your way again.