How can you get your email on a cruise without having to pay those ridiculous charges the ship sets?

Shanna K asked:

My dad is going on a cruise and he is a lawyer, he gets about 200 if not more emails a day and he has to work and check his email while on vaca. The cruise ship charges about 4 dollars for every email that come in or goes out, how can he recieve his emails without being broke at the end of his cruise?