Restricted posting

[Ian Lissimore <ilissimo @ eso . org>]

I know that I can add address to a file specified by the restrict_post
option in the configuration. But is it possible to set this up so that 
<anyname>@domain.org can post to a list.

Basically I want to restrict posting to a list to my own domain without
having to update a file with individual users.

Thanks 
Ian