Designated Proxy User
This module helps manage Drupal user accounts that are created without an email address. It can either automatically generate a placeholder email address or allow a designated user to manage these accounts and receive any intercepted emails. This ensures users without email addresses don't encounter issues and can still access important account information.
The module assists with user accounts created without an email address, by allowing another user account to be designated to manage the account on their behalf.
Although Drupal does allow accounts to be created without an email address, some parts of the core system and other contributed modules may not work as expected without a valid email address attached to the account.
This module can help in two ways: it can be set to generate a generic, technically valid, but undeliverable email address if the email address field is left blank on account creation, so that managed users do not encounter such errors; and it can allow another designated user account to help manage the email-less user account.
Any emails sent to the invalid placeholder address will then be intercepted and sent to the designated contact instead. The message can be passed on to the intended recipient by other means. This helps to prevent the user from losing access to important information about their user account.
The user manager role should only be given to trusted users as it allows access to edit the designated user account(s), including resetting the password, and to read their undeliverable messages.