Samsung (Ticker: KRX:005930Unfortunately, we could not get stock quote KRX:005930 this time.) sent out an email to users of MyKnox today, informing them that the service would be terminated. I personally used MyKnox for my day to day work emails as my job required a certain level of security and I did not want them to have access to my entire phone.
Samsung suggests using their secure folder app, however, it is not the same.
The app worked great, but it did have some bugs. A screen shot of the message Samsung sent users is below.