Hi Anita, With the Ethernet card, you should be able to use your BN with Roadrunner. When you ask how the card is to be installed, do you mean how does it go into the BN, OR HOW TO CONFIGURE THE BN to work with it? Each upgrade of Keysoft has improved the way the BN handles Email, so I would encourage you to keep current with the upgrades. As for how much mail the BN can hold, that would depend on how much memory your BN has. It's like a computer in that respect. In future, it would be helpful if you could ask your questions one or two at a time.
Andy
