How do I set privacy for Messaging?
Now you can enable or disable getting messages from the following group of users:
- Everyone
- People I Follow.
- People I Follow.
To set privacy to control who can send you Messages:-
For Android:
1. Tap on Profile icon item on right down corner.
2. Tap on the Settings icon 
in the top right corner.
3. Tap on Privacy Settings.
4. Tap on the drop-down menu to change the privacy settings for your list.
5. Tap on Done.
For iOS:
1. Tap on Profile icon item on right down corner.
2. Tap on the Settings icon in the top right corner.
3. Tap on Privacy Settings.
4. Tap on the drop-down menu to change the privacy settings for your list.
5. Tap on Done.