E-mail Piping - Integrating your mailbox with your web application.

E-mail Piping is the process of passing the contents of an email as an input-variable to a script or a program on your webserver.
For example, with e-mail piping you can do things like:

allow mobile users to upload photos or videos to your website from their cellphones
send an auto response
submit help desk ticket
subscribe the sender to [...]