Seen Mailalias?

Mailalias does exactly what it states -- allows you to create alias emails. Effectively, this lets mailhandler (http://drupal.org/project/mailhandler) treat the aliased emails as valid sources for mail-driven authoring.

multiple_email presents an interface for managing multiple email addresses, implements confirmation so that when a user adds a new address, the address must be confirmed within a confirmation window/deadline (default 5 days), allows the user to select any of the confirmed email addresses as their primary address at which to receive emails to their user (sets users.mail), and assures that a new user registering is not registering with an email address already registered to another user (also keeps a current user from accidentally creating an additional account by mistake -- assuming they've registered all their emails with their primary account [helps a little]).

I think a good feature would be to integrate multiple_email with mailhandler, so that like mailalias, mailhandler will recognize any confirmed addressed registered with multiple_email as a valid from: for node authoring. I have not looked into implementing this feature yet.

Wow, 8 year ago was the last comment. I wonder if multiple_email has ever been integrated with mailhandler?

In fact, there is the Mailhandler Multiple Email support module. Would be nice to mention on the module's main page it works with Mailhandler.