Note the procedures on this page are no-longer necessary for domains under my control. I now use certificates signed by StartSSL who are trusted Certificate Authorities in most browsers/Operating systems.
In order to stop warnings from email clients and web browsers it is necessary to install the CAcert root “Certificate Authority” certificates into your computers stores. Unfortunately different appplications use different stores. Follow the appropriate procedures below for each of the applications that you have installed/use.
- Internet Explorer/Outlook/Outlook Express
- Mozilla Firefox
- Mozilla Thunderbird
- Android Phone
Once this procedure is completed you should not be prompted for mismatching certificates on the Oldelvet servers again.
Internet Explorer and Microsoft email clients all use the same certificate store. The easiest approach is to use Internet Explorer to navigate to the CAcert root page and click on the appropriate certificates to run/install them.
Firefox uses its own certificate store. New entries can be added easily by following the PEM links from the CAcert root download page.
Thunderbird uses its own certificate store in a similar way to Firefox. However this requires that you save the certificate files from the CAcert root keys download page and then import them manually.
To install the certificates in Opera just visit the CAcert root keys download page and follow the next few simple steps.
Navigate to the CAcert root page and then install each of the appropriate certificates.
To be completed.