Support for Email Server TLS encryption on Sentora?

[americanninja]

So I noticed Google is now displaying broken lock icons on emails that are sent by email servers not using TLS encryption. As this was just rolled out, most users won't notice it, but soon they will. Currently, all email sent out by my Sentora managed server are coming into my gmail client with this broken icon, so I assume the server is not configured with TLS encryption. Is there any easy way to just turn this on?

You can read more about this on Google's website here:
https://www.google.com/transparencyrepor...tls/?hl=en
http://gmailblog.blogspot.jp/2016/02/mak...ed-by.html