Shortmail.com is designed to create a digestible inbox. By limiting messages to 500 characters, Shortmail is “stressing conciseness.” Like Twitter, Shortmail features a character counter which tracks each letter typed–reach the max, and Shortmail will not allow you to send the message. The same restriction applies to messages received. — More at FastCompany

You can Shortmail me at: smaysdotcom@shortmail.com