S and M
Here is a micro mail system, ideal for browsing with your phone. It's written in PHP and is available here:
Previous versions are here:
To use it unpack the tarball and read the
Basically it's a very very very bare-bones mail client written in
PHP. So yeah, you'll need PHP (and a web server). Here is a screen
shot of it (and some of my spam).
As everything, there is none; use at your risk.
Changes are here.
The S is for small, the M is for mail.