stop postmaster to make more acounts..

[Geir Ove Øksnes]

I have a problem... 

My customers have paid for like 100 email accounts
and one postmaster account...  how to i restrict him
from making more than 100 email accounts?... 
this is on a virtual domain..


-- 
Sincerely
Geir Ove Øksnes
System admin.

EXO isp AS
Postboks 1917 Nordnes
5817 Bergen
Norway
Phone: (+47) 55 90 46 53
Fax: (+47) 55 90 46 47
Web: http://www.exoisp.no