I wish to upload a DVD of 3GB and send it as email attachment. Can i? If not what is the size of i can send?

20mb thats it.

You can send email attachment between 5 - 10 MB not more than that if you are using free mail servicing...

First off, I wouldn't recommend that, it'll be ugly if you get caught sharing/copying movies (I'm assuming you don't own the copyright) Most email services limit to between 5 and 20MB attachments. There are services that allow up to a gigabyte (or more) but I don't remember them now.

ONE WAY IS THAT YOU UPLOAD YOUR CONTENT ON RAPIDSHARE AND GIVE THE LINKS TO THE PEOPLE WHOM YOU WANT TO SHARE AND IF IT IS SOMETHING PERSONAL DON'T FORGET TO PASSWORD PROTECT It

since its a huge file, you may use a torrent program. Its pretty easy. use utorrent, then create a link thru utorrent & send that link to your friends.

You can't. Most all email providers have 10MB limits set. Your best bet would be to use either a P2P like Limewire or BitTorrent, or Set up a FTP on your computer, or use an online file storing service like http://www.box.net How to create a FTP http://www.pcstats.com/articleview.cfm?articleID=1491

try http://www.mediafire.com/

10MB is the largest you can send through e-mail