Can be we shall add the table domains and clientid we shall use for identification of an accessory of a box to the domain or we shall add in users a field domain_idnr. It will be more convenient to select users for domains, without special researches on sql. As it is more convenient for connection to anothers MTA, for example for definition of the list of domains for relay.
For example on ORACLE at now: select substr(userid,instr(userid,'@')+1) from users where userid not like '%internal_delivery_user%' or select userid from users where substr(userid,instr(userid,'@')+1) = '%s' Agree not so conveniently :)
