Hello Mediawiki list, I posted this question *in more detail at the Wikipedia Reference Desk*<http://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Computing#Ca…3F>, and the  answerer suggested I forward it here.  If this is not the right place to ask this question, please let me know where to go next?  Here is what I posted at the reference desk: *I'm on the student senate at my school, and we want to customize our > mediawiki install so it only lets someone create an account (i.e. edit) if > their email address ends in @[school_name].edu. We also want to force their > username to be the [first].[last]@ from their email address. Later, we might > expand this to more schools, so we would want the flexibility to add other > @[school_name].edu's to have the ability to create accounts.*