My browser gives error about invalid security certificate ?

You may receive messages like those below when attempting to delete messages from the links in your quarantine email .. or when logging into the spam system.

At time of writing these errors are know to relate to Firefox v3.0.11, v3.5. A root cert is missing from the browser. From within your Firefox browser click on this file and you will be prompted with the box below. Tick all check boxes and select 'OK'. This should resolve the issue for you.