This Method is going to answer all the questions below

1. How to use Remote Desktop in connecting a System Which is in WAN to a System which is in  another WAN(consider that you have a system in WAN at your home and you want to connect to your friends system which is WAN at his home)(Remote Desktop Web  Access)
2. How to use Remote Desktop in connecting a System Which is in LAN to a System which is in WAN(consider that your friend has  three systems in LAN at his home and you have one system at your home which is in WAN and he wants to connect to connect from any one of the systems in LAN to your system)

How to use spam filters in lotus notes?

If you consider your data to be more protected,then it is better to use spam filters.Spam filters will not allow any spam to enter in your system.Actually the word spam directs to unsolicited junk e-mail which can be sent to large numbers to promote products.It is tough to decide for human which messages are spam and which are legitimate email.
Enabling/Disabling the spam filters in Lotus Notes:
It is so easy to enable and disable spam filters in lotus notes.You can periodically check “spam” folder as shown below.It is better to gaurd regularly.As shown below a new menu “spam”will open in “Actions” menu in thenotes client.