Google sets new rules for third-party apps to access Gmail data
All Gmail third-party apps with full access to Gmail user data will need to re-submit for a review by February 15, 2018, or be removed.
A PreSales Engineer's Blog about Virtualization, Security and IoT (and of course Hedgehogs)
All Gmail third-party apps with full access to Gmail user data will need to re-submit for a review by February 15, 2018, or be removed.