Brewbud
Brewmeister Meisterbrew
If you click on their profile pic you can choose "Start a Conversation". It will open up the screen to send them a private message here on the forum. Clicking on the envelope symbol in the top right-hand corner of the forum page will open your message center so you can check for replies. When they reply the envelope symbol in the top right-hand corner will have an alert (red dot with number) show up on it.