What will I need to do in order to send a message to remind someone of an appointment.
Lets say that the users of a webbased booking system can enter the site and decide a date that the should do something. This is then stored in a database. How do I do in order to send a reminder to that person to tell him/her "Tomorrow is your turn..".
The datasbase will be stored at a server that we are not running ourself, that is we buy the space and access to it.