I believe wordpress would be fine for this website.
The website would be a game type related design but simple.
In the main part of the main page it will show users posts and people can rate each post.
The second part of the site will be a section where users can make an email address for 7-8 domain names and create their own email address that they can login to from the website.
for those who might be confused you dont have to create a plugin for wordpress for the email system you can use something like [url removed, login to view] the email system and wordpress dont have to be intergrated a blank page on wordpress would be suitable
So a simple login page for the email and creation page
Then the 3rd page i would need would be where people read their emails.
I have the design already done and psd ready