[otrs] otrs auto self registration

I'd like to use OTRS to manage email communication for some of our external email addresses. They are mainly used for situations where the person sending in a request is not a current customer (pre_sales@, product_info@, etc...). I'd like to be able to communicate with these people strictly via email, and not expose the customer.pl interface to them at all. Is there a module that auto-magically registers new users that email into the system? Thanks -Mark