Native RSS reader which allows to set explizit the status of an article

My last comment just gave me one idea that might solve your issue: Google's Feedburner. You can configure it to send emails from any feed. It will be little troublesome at first as it's a long manual job. Seems like it is unsupported and not really meant to be used like this. But it works perfectly!

Here are some quotes from its own help:

What triggers the email to be sent out?

FeedBurner sends subscribers a daily digest of new content from your blog, so a new post, new title, link, or change to the published date will trigger the email delivery. If you do not post anything that day, no email is sent out.

FeedBurner only keeps a change history for items currently listed in the feed. Once they “drop off the bottom” of the feed, the system forgets about them completely. If you re-introduced them later by increasing the number of items your feed contains, this will result in the newly included items being delivered via email as “new” content.

How much does this service cost and what methods of payment are accepted?

FeedBurner Email is a free service. However, we do accept voluntary payment in the form of props and general goodwill.

How do you get started?

Sign in to your FeedBurner account, select your feed, navigate to the Publicize tab and select "Email Subscriptions."

Consider Panic's Status Board app: it includes configurable modules for everything you've asked for.