You can message other Quora users using our 'Messages' feature.
On the web, open Messages in the Profile menu at the top-right. From your mobile app, you can find Messages in the 'You' tab. To send a new message, click on the 'Messages' link below your name and profile description, then click on 'Compose' in the bottom right.
You can also message a user directly by visiting their profile, then clicking on the 'Message' link below their username and profile description.
You can control who sends you messages on Quora, and you may not be able to message all users on Quora (depending on their settings). The default mode for messaging is that, with some exceptions, you will only receive messages from people you follow. You can still allow anyone to message you by changing your. You can also choose to turn off messages altogether. These settings mean that new messages you receive will generally be from people that you connect with, and there will be less risk of spam or harassment from strangers.