Mailcell!

No need to e-mail addresses anymore Mailcell is an application which enables users to send e-mails directly to the phone numbers without typing an e-mail address Its an instant e-mailing application which provides people to send e-mails directly to the phone numbers by simply typing the numbers only It also enables you to send voice message, location, and contact by an e-mail, as well as sending the basic stuff such as images, videos, and documents. As a distinguishing feature; its not compulsory to save the contacts in to your phonebook, and you may easily type the phone number to send an e-mail instead. You can also keep your private e-mails by a password in Locked Box.