Need reminder application that runs on server and is configurable with a web UI
I am searching for an application that has the capability to send me an email at a specified date with a specified text.
Since I am using several systems a local application, like kalarm, is not useful to me. I need something that can run on my home-server (currently Debian Squeeze, soon to be Slackware 14) and can preferably be used via a web UI (SSH or a client application would also be OK). Apache is running anyways on that system.
Web searches only come up with online alarm clocks, but I didn't found one that is capable of sending mails and I would prefer to use on my own server for that.
So, does anyone know of such an application and can post a link to it?