We are using an older version 9.5.0.38 May 7 2014 and CkMailMan STARTTLS fails now that our email server is forcing TLS 1.2.
I am trying to discover at what point 1.2 support was actually added. Searching the release notes I see:
9.5.0.46 (Dec 5 2014) Defaults to TLS 1.2, if server supports it http://cknotes.com/v9-5-0-46-micro-update-new-features-fixes-changes-etc/
but not sure if that applies only to HTTP or includes SMTP. If so we just missed it by months! Getting a new version of our app deployed is a major undertaking.
I don't suppose there is a workaround for the older version; i.e. an environment variable that would cause it to do negotiation in Windows. I read in another post (win7 vs. win8) that since Chilkat is multi-platform it has its own encryption code.
John Kalstrom