First, check the setting that does not exist in the older firmware, whatever the newer one says now, try the opposite and see if it resolves it. (I would guess that TLS only is the one you would want since gmail tends to not allow Xerox devices on port 465 but does on 587, which is where the SHA-2 comes into play as well)
Security – This FW includes mitigation of the Poodle and Freak vulnerability by implementing a change to default SSL to off and use TLS only. The "TLS Only" or "Only TLS" checkbox will be enabled by default and will support TLS versions 1.2, 1.1 and 1.0. When choosing the "TLS Only" or "Only TLS" checkbox, all SSL only connections will no longer work.
If “TLS Only” or “Only TLS” is unchecked, the device will use SSL (v1 or v2) and TLS (all versions) simultaneously if needed.