I need to send once a week, the latest published articles

I need to send once a week, the latest published articles based on categories to the members.

a rss feed on each category would do the job.

Mailchimp and contactoly can send automatic newsletter based a rss feed, but they cannot login to the portal. Reason we choose to install enewsletter.

and manually, no way to copy paste feed..

How do we do that ?

thanks for help !

Daniel Rivalin