I use Mozill Thunderbird portable for my emails, so I can access them anywhere. So I thought. I can acces my Sky emails on my Windows 7 pc at work, no problem. When I try to access the same account on my home pc, which is a Windows 10 OS, I get the Add Security Exception dialogue pop up. I've tried clicking Confirm Security Exception, and Get Certificate, but nothing happings. I've even been of the Sky commuity forum with the problem, and they suggested changing account settings, but that didn't seem to work either. It says the location of the certificate is pop.tools.sky.com:995, which as I saiid, works on my Windows 7 machine at work.