error messages

I don't know what the following means: 

From: "cPanel on sosbeagles.org" <[email protected]>
To: <[email protected]>,<[email protected]>
Subject: [sosbeagles.org] ⚠ testing.sosbeagles.org: SSL certificate expiry on 12/26/24 UTC
Date: Tue, 03 Dec 2024 07:31:33 GMT

btw, I just changed the second email address to [email protected]