ref: ED019-2
User story
Is your feature request related to a problem? Please describe.
As a participant I'd like to have the option for only receive private messages from people that I already follow.
Describe the solution you'd like
I want to have an option "Receive messages from everyone" on my user profile checked by default on the Notifications page of my user account.
Describe alternatives you've considered
To have this as an option opt-in (something like 'I want to receive private messages from only the people that I follow') but this would effectively kill this feature (as most people wouldn't even know that this exists)
Additional context
Twitter (and other Social Networks) has implemented this already:

Does this issue could impact on users private data?
No
Acceptance criteria
ref: ED019-2
User story
Is your feature request related to a problem? Please describe.
As a participant I'd like to have the option for only receive private messages from people that I already follow.
Describe the solution you'd like
I want to have an option "Receive messages from everyone" on my user profile checked by default on the Notifications page of my user account.
Describe alternatives you've considered
To have this as an option opt-in (something like 'I want to receive private messages from only the people that I follow') but this would effectively kill this feature (as most people wouldn't even know that this exists)
Additional context
Twitter (and other Social Networks) has implemented this already:
Does this issue could impact on users private data?
No
Acceptance criteria