This is an SMTP server written in Go which streams incoming mail to your (and everybody else's) active WebSocket connection.

Test it! Email whatever@websomtep.danga.com (protip: images work too)

You'll need Chrome 19 or 20 or Firefox or something for the WebSocket stuff.

Source code is here: https://github.com/bradfitz/websomtep.

websomtep == websockets + SMTP