If you are writing a Russian correspondent online then you will likely need to write Russian words. The Russian alphabet is based upon and naturally similar to the Cyrillic alphabet (an alphabet developed in Bulgaria and used in the East throughout Asia). So to write Russian words you need to use the Russian alphabet. With an English keyboard this may seem difficult to accomplish, but in fact there are various virtual Russian keyboards available online. These allow you to type Russian words using the English keys on your keyboard.
Open your preferred web browser and go to a Russian keyboard website such as Apronus, Winrus or TypeIt (see Resources).
Click in the main text box.
Begin typing, and you will notice that the Russian characters are replacing your English keys. Once you have finished typing you can copy and paste your message in an email to send to a Russian recipient.