There's multiple RSS to Email services (and trivial open source software you can use to convert RSS feeds to E-Mails to yourself). Isn't that what you're looki

There's multiple RSS to Email services (and trivial open source software you can use to convert RSS feeds to E-Mails to yourself). Isn't that what you're looking for? Then you can use any non-"basic email client" to get all the sorts of advanced filtering etc. you're describing.