Message block rules - block all strangers - not worked on Honor 10 with EMUI 8.1.
Calls from strangers are blocked, but SMS are not blocked :-(
usually when you block a number, SMS and calls are both blocked.
take a look at this link: http://www.gadgetdetail.com/honor-emui-8-0-block-calls-messages/ and try again or consider using an app to block the numbers.
Hi there. If you really want to block someone's number, I highly suggest using 3rd party text messaging app. Most of them have SMS blocking features. Try to install one from Google Play store and check the settings of the app. Good luck!