Why do you say that? Standard permissions, without you editing them should be working just fine.
Changing thoes permissions, I believe, would allow others from your server to access your home direcotry - including all of your E-mail. So this probably isn't something that you'd want to do.
You should be placing all of your site files inside of the domain.com folder in your home directory. As I said before, this should already have correct permissions set.