To allow particular domain name for registration:

Knowgate, modified 6 Months ago. Youngling Posts: 13 Join Date: 7/30/14 Recent Posts
Go to command prompt and type following command:
   [root@localhost~]# vi /dspace/config/modules/authentication-password.cfg

Add the following parameter:
  domain.valid=give the domain name that you want to allow (Eg. niscair.res.in)