How to find which Operating Systems are certified with versions of z/OS, and other Operating Systems?

Operating System: z/OS
Products affected:  MailStream Plus Mail360 Manager Code 1 Plus Finalist Canadian Code 1 Plus

There is a Pitney Bowes Software document that shows what has been certified.  Go here -
Then choose - "Communication Intelligence Products Supported Platforms"

The document has a breakdown for many Products and the Certified Operating Systems versions for them.  

The document shows the various software applications certified for:  z/OS 1.11, 1.12, 1.13, 2.1 and 2.2

(The document also covers UNIX/Linux, Windows, IBMi and other platforms.)  

This information is current as-of January 2017.

UPDATED:  April 14, 2017