A number of our users have reported receiving hundreds of RSS feeds - unwanted and unsolicited - and all coming from (or "appearing to come from" MSN News. Example:

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Posted On: Tue 5/26/2015 3:22 AM

Author: National News - MSN News

Subject: At least one dead, dozens injured across state after Monday's storms

Another round of tornadoes and severe thunderstorms Monday brought heavy rain, flooded roads and at least one confirmed death. The state medical examiner reported one person died in Bryan County after heavy storms battered the area. The name of the person ...

View Article...

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Does anyone know what can cause this sort of behavior??

Hi,

I would have thought users would have got these because they are signed up to an RSS feed within outlook. 

They may not have done this intentionally.

https://support.office.com/en-ie/article/Unsubscribe-from-an-RSS-Feed-9b061bfd-a480-4387-9c1a-4df17afa924b

This article shows how to unsubscribe from these feeds.

Thank you! I saw that article, and we have shared it, but our users "swear" they did nothing that would have initiated the receipt of these feeds. Very strange...

They might have signed up for this when setting up their mailbox? I have seen that previously, just need to make not of what is being selected when going through the process.