There is a two year old discussion about this but nothing more recent so I'd appreciate some help. I have DNN 9.00.02 installed but cannot utilize Office365's SMTP server for outbound email routing. I think this is because Office365 uses TLS 1.2. Does DNN 9 implement TLS 1.2? Does anyone know whether TLS is my problem?
I found that someone has written a dll to implement TLS 1.2: (to enforce TLS 1.2 on your outbound connections like HttpWebRequests, just download the assembly [DotNetNuke.Security.Tls12.dll!](https://github.com/davidjrh/dnn.tls12/blob/master/bin/DotNetNuke.Security.Tls12.dll?raw=true) and drop it into the ~/bin folder of your DNN installation.)
I tried doing this and it did not help. I'd appreciate anything anyone can tell me about using Office365's SMTP router with DNN 9 and or DNN's TLS 1.2 support ability.