I am making a new mail server at college. I am not able to get any ethernet card. Can you please send me the places where i can get these.
Any computer store should have them. New ones are about US$10 in the US and used ones go for about US$3. I'm not sure about pricing & availability in Nagpur.
Check any old PC / server at the college that's about to be thrown out, it may have a separate card that's not built in to the motherboard that you can use.