Hello steemers !
I don't know if this is possible but i think steemit should have a private message option between users.
My suggestion is that to apply some filters to this option for example we can have private messages :
-only from followers
-from specific members (choose them by username for example)
-from everyone
-from noone
We can have also a "deny" or "allow" option if someone wants to sent a pm .
With this option me can send an email address,skype etc for example to a user and not show it in public.
What to do you think ?
If you like this post please upvote resteem and follow 
Thank you .