Suggestion : "configurable Email Field subject" and Tokens in message

Issue Summary

Hi,

As some nodes Title, that contain email field, may be a bit long, I suggest this :

1) Ability to setup either :
- today [Title as Subject introduction]
- [Fixed Text introduction] for that field in this content-type
- [Site name introduction]

2) Ability to add a bottom text (before general mail bottom text) and use tokens. Example of use case : "Sent from node {node title} ...
in order to understand in what context this mail was sent.

Hope this suggestions may help.
Thank you