transport dovecot for vuser and one domain transport local

==== Required information ====
- iRedMail version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
======== Required information ====
- iRedMail version: 0.8.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): mysql
- Linux/BSD distribution name and version: debian wheezy
- Related log if you're reporting an issue:
====

Hi
I have one stupid question

All works fine but I have one problem for ... I must create one domain with transport local and one user

In normal configurations (not in iredmail) i use:

local_transport = local:$myhostname

#local_recipient_maps = $alias_maps $virtual_mailbox_maps unix:passwd.byname
local_recipient_maps = proxy:unix:passwd.byname $alias_maps

virtual_transport = virtual
virtual_mailbox_domains = vdomain1 , vdomain2

and working fine

but i dont known how force iredmail to working with default transport (virtual dovecot) vdomain and one domain with transport local i change transport in db to local and use

local_transport = local:$myhostname

and dont working because any time i get in log:

status=deferred (temporary failure)
or
status=bounced

Now it works temporarily domain local (delivery local) but this is alias for vdomain

any idea ?