Let's say I want to allow user1 to register 1234567890(a)iptel.org with a password of pw1. Based on the User Guide, it is being worked on in module domain. Based on the README for module uri, it is implemented there. Is it actually implemented anywhere? If yes, what has to go in which column of which table? I tried: insert into uri values('user1', 'iptel.org' , '1234567890' ,''); and insert into uri values('1234567890', 'iptel.org' , 'user1' ,''); and restarted. Looking at the debug, it looks like it just compared Digest and To, without any additional checking when that failed. Thanks.