Okay I did something stewpid and realise just how much of a noob i am....
posted to a list and a guy asks me for info on my network...which doh! I gave out. Firewall type. Switches in the network. OS of the server. Too trusting for once.

So flame me if you like but I want to know, if he gets my ip...then he can pretty much tailor make some probes?
Getting my ip will be hard for him as he thinks I am somewhere else than where I am I hope(My email address is linked to a server somewhere where my network is not).
Could he use my domain name to find my network which is not connected to the mail server except over the net.?
Living and learning is hard at this level!!