To use this module, make sure that planner-rmail.el is in your load path and add this to your .emacs (or _emacs):
(require 'planner-rmail)
Rmail URLs are of the form:
rmail://message-id
Annotations will be of the form:
[[rmail://<E1AyTpt-0000JR-LU@sacha.ateneo.edu>][E-mail from Sacha Chua]]
planner-rmail.el does not define any interactive functions or create any new keybindings.
For more information about Rmail, see see Reading Mail With Rmail.