The latest web services are increasingly focusing on activities being social. One of these web services is Shortmail, a simplified email service that lets you send short emails in a friendlier and more social way. The site lets you sign up through your Twitter account. Your email address on Shortmail is your Twitter username followed by @shortmail.com.
Shortmail is completely supported by iPhones and Androids. All messages are limited to 500 characters and don't include attachments. Just a simple message, straight and to the point.