Feature request: improve the mail and notification system

Hello,
it would be great to have the possibility to customize the expiration emails per each plan, meaning that each plan can have his own alerts.
Another great addon would be the possibility to set an email (still customized per each plan) that goes out when the subscription is being purchased.

In my case I sell access to online contents and need to send out the links to those contents immediately after the purchase. It's not a MUST, but it really helps users to find quickly what they paid for.
I also like to customize the expiration emails per each plan to make them more efficient "marketing-wise"

Thank you

Well, maybe if want do to something simple you could just allow the dropdown menu to pick from a folder where the user can insert his own templates (maybe it's already like this, I haven't really looked into it), but also add another dropdown to assign each email to a certain plan.