Program should have a more descriptive error when trying to connect to a different version

When trying to connect to someone else with a different version (for example when one person is updated and the other has not), the program really should say that the versions are mismatched rather than just not connecting and giving the disconnected from server error. There are so many reasons to get the disconnected from server error. A more descriptive error such as "we're sorry, your version is x and the server you are connecting to is y" would be helpful to the end user.