control/locals prolem

[Yessure <yessure@xxxxxxxxxxxxxx>]

Hi,
  For some reason, I must let our qmail treat all hosts like *.mydomain.com
as local host. (There are over 50000 hosts and increase very fast, I cann't
add it one per line into control/locals).
   So I add a line '.mydomain.com' into control/locals.  But when I send a
letter to root@xxxxxxxxxxxxxxxxxxxxxxx, (it should be treat as a local
host!), qmail tell me:
it_isn't_in_my_control/locals_file,_so_I_don't_treat_it_as_local._(#5.4.6)
It Clearly show that  the line'.mydomain.com' in control/locals has no any
effect.  :(
  Now what can do?

 Thanks very much.


Yessure