Gmail

With Gmail, use Google to search for the exact message you want; use chat or e-mail within the same service; gain access from an Internet computer or your mobile phone. There is over 2,500 megabytes of free storage

Hotmail

Hotmail includes virus scanning, junk e-mail filters, 250 megabytes of free storage, access from any computer with Internet access, the ability to send files up to 10 megabytes.

Yahoo Mail

Yahoo offers virus and junk e-mail protection, access from Internet computers or mobile phones, the ability to send files up to 10 megabytes.