Thanks to all for the help Re: Network Security. I was feeling confident that I have got things buttoned up fairly securely and so moved onto setting up postfix to forward mail to my IPS's smtp server for delivery.
Things are working fine in respect to sending my mail but now I seem to have port 25 open. As I use fetchmail to retrieve my mail from my ISP I can't really see any need for postfix to be listening on this port. So does anyone know how I can go about disabling it. Or maybe its not a big worry and I should just leave it as is. Thanks Ross
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