My existing Lets Encrypt SSL on my Icewarp installation renewed as expected, however it started being rejected (it's been in use for over a year now) because the TLS certificate is not trusted: Let's Encrypt Authority X3, Issuer DST ROOT CA X3. It is and always has been an automated process - Is there anything I can do to replace this intermediate certificate? Everything else passes and is good.
The certificate IN icewarp has green checkmark and expiry May 2021.
My domain is:mail.mcspowermail.com
The operating system my web server runs on is (include version): Windows Server 2008 R2
I can login to a root shell on my machine (yes or no, or I don't know):yes
I'm using a control panel to manage my site (no, or provide the name and version of the control panel):no