Users Same Email

By default, Joomla user manager will not allow different users to register or change their email to an address alredy used by another user. Really, there is not real need to implement this policy, and under some situations, you might want the opposite to be enforced. For example, one same user holding differents accounts, different users from same household, for testing purposes, etc.

Install and activate this plugin, and your users will be able to provide any email they wish, regardless of any other user using it.