I am looking for a module able to send scheduled emails to users, which subscribed to something, and the subscription is going to expire soon. Anyone knows about such a subscription handling module?

The problem is that the Ventrian's module only works on the principle "expiration date = current date + a fixed period", and I need to be able to set the expiration date to any day, at any time, for any user .

The worse thing is that not only I cannot find a DNN module to do this, I even cannot find a general program, which could send a defined expiration warning to users in database automatically, based on the current date...