Cases we want to handle with a unified email system:

1. (current) customizable main messages and account info email "inclusions" for:
   
   • creating account
   • inviting user
   • accepting request
   • handling forgotten passwords)
2. (current) change notifications
3. (current) account request notification
4. forms that send email to explicit email address
5. forms that send email to list of addresses referred to by search or pointer
6. ability to email any card