[How can you contact another member on here by just knowing their call sign.]

21 minutes ago, Sshannon said:

If they used their call sign as their ID, or if they’ve included it in a post you can find it with a search. 
It’s possible that they have a sign-in for the website but not for the forum. 
But, if you know their call sign it is very easy to look up their name and address using the call sign lookup on the website here or in the FCC database. 
What’s the call sign?
 

I found their mailing address and information , but no email. I was just wondering if their was a way to message them on this site. Thanks.

[How can you contact another member on here by just knowing their call sign.]

I need to contact an owner of a repeater and all I know is their  Call Sign .  Is there a way to do that on here?