Getting things onto the Kobo is handled by Pocket if you go this route, so the challenge becomes to add things to your Pocket account automatically. RSS seems easier than email, but I think it should be doable.

Seems like you can forward emails to add@getpocket.com, but I'm not sure if it works with body text or only if you just send a link[1].

[1]: https://blog.getpocket.com/2009/04/2-new-ways-to-save-to-rea...