Well, that's unfortunate because I bought this plugin to replace another one that had this feature (it simply ignored them and didn't display the code itself) but was unreliable. I guess the only way I can work around this if I continue to use your plugin is to create a second copy of each post I want to have appear in the email and note it as a category of EMAIL.
Let me STRONGLY encourage/beg/plead that a switch be added in a soon-to-be-released version that turns on/off the ability to filter out shortcodes. Seems a pretty easy feature to add.