I would instead use Yousendit, and then imput the persons email as the recipient. You can then email that person up to 1GB.
Another thing to note is if you send someone a 50mb attachment in your email. It may fill their email up and you would not be too popular for doing that.
Yousendit was designed for emailing large files. And its free.
But if you absolutely want to do it. There is a one that i know that i belive does it. Its hellacious riders or something. They give you 1 Tera Byte Free email accounts and 100mb email attachments if i remember correcly
Here it is