Received DMCA Notice after using Autoblog Plugins

I used autoblog plugin to publish articles using RSS feed of http://www.wpbeginner.com with proper mentioning of the source post link etc. but just one next day I received DMCA notice to take it down immediately.
Now, I can't understand how to use it and how to find proper RSS feeds which will not send DMCA notices for publishing their articles. Can you help me with this? My field of interest for feeds are WordPress Themes, How to guide, hosting tips and tutorials etc.

Is it okay to use WPMUDEV feeds to use it with Autoblog plugin? Please reply.

Thank you