In respect to this, how do I send a steam message to a Non friend?
Either way, you can use Invisible Mode by selecting your username from the top left of the chat window and selecting Invisible. It is both a shame and to the good that you cannot send a message on Steam to someone who's not your friend.
Beside above, how do I check steam messages? If you have the Steam mobile app, you can access previous messages sent to and from Steam friends in chat. Once you install the mobile app and log in, select the hamburger menu (on iOS and Android, click the friends tab on Windows Phone), and then press chat . Select the user you want to chat with.
Thereof, why can't I send messages on steam?
Disable Steam overlay. Disable your security software. Uninstall interfering programs.
How do I trade with non friends on Steam?
If you are already friends with someone, you can simply use the friends tab. Then, locate the person you want to trade with, click the triangle next to their name and click Invite to Trade. Finally, you can now also start Steam trades merely by virtue of being connected to the same TF2 server.
