Migration note: Removal of EmailModule

Author: akkrishnakumar

content/en/docs/refguide/installation/upgrading-from-10-to-11.md

@@ -99,3 +99,4 @@ For optimal implementation, ensure all UI modules either use CSS variables or ha
 * When COALESCE function in OQL has attributes of different numeric types, the result type is defined according to type precedence. Before, the result type would match the type of the first argument.
 * Client API `mx.logger` is no longer supported. All calls to it should be replaced with standard `console.log`, `console.warn`, and other such standard calls. All widgets that use the `mx.logger` need to be updated. 
 * We no longer convert `empty` values sent to the client into empty strings. All client side expressions must be adjusted accordingly.
+* We no longer support `com.mendix.modules.email.EmailModule`. We recommend using the [Email Connector](https://marketplace.mendix.com/link/component/120739) module instead.