Long title, I know…

I was trying to get Windows RT’s Mail App to access the email on my own server. The server uses IMAPS with s self-signed certificate as I only want SSL for it encryption and don’t really need it for authentication purposes as well. As long as it is the correct self-signed certificate I’m happy.

The Mail app however rejects certificates that weren’t signed by a trusted authority and doesn’t offer an obvious exception mechanism (like Thunderbird or Apple Mail) that circumvents the need for a trusted certificate. The original Mail app that came with my surface also displays only a very cryptic error messages, but the latest update from earlier this week correctly suggests that one needs to add the self-signed certificate to the certificate storage in order to get Mail to recognize the certificate.