Early yesterday we installed a new wildcard SSL certificate on server NC018. In the testing we did everything worked fine. However, we’ve had reports today that Mac users are getting an SSL warning from both Firefox and Safari, and some Firefox users on Windows are also getting the same warning.
This affects sub-domains of the niner.net domain — e.g., the control panel (cp.niner.net), the webmail (webmail.niner.net) and a few other sub-domains.
We are looking into this and will post an update here when the problem is fixed. In the meantime, it is safe to ignore the dire warning by following the instructions you will see in your browser.