ISPconfig 3.1 mailbox creation method

Hi,
I migrated our old Postfixadmin+courier mailserver to ISPconfig 3.14.
I used these SQL commands to migrate the database.

Code:

insert into mail_domain (sys_userid,sys_groupid,sys_perm_user,sys_perm_group,server_id,domain) select
'0','1','riud','riud','1',domain from postfix.domain;

Code:

insert into mail_user (sys_userid,sys_groupid,sys_perm_user,sys_perm_group,server_id,email,login,password,maildir,quota,homedir)
select '0','1','riud','riud','1',username,username,password,concat('/var/mail/',maildir),quota,'/var/vmail'
from postfix.mailbox;

Code:

insert into mail_forwarding (sys_userid,sys_groupid,sys_perm_user,sys_perm_group,server_id,source,destination,type)
select '0','1','riud','riud','1',alias.address,alias.goto,'forward' from
postfix.alias where (postfix.alias.address != postfix.alias.goto);

Code:

update mail_domain set active='y';
update mail_forwarding set active='y';
update mail_user set postfix='y';

Mail domains and mailboxes shown good on the ISPconfig interface.
I did a resync for all ISPconfig services so it created the mailbox folders in the filesystem.
I copied te mails and courier files from the old server to the correct locations (../$mailbox/Maildir/).
I run the courier->dovecot migrate script from the dowecot wiki page.

It seemed good.
But,

When I try to change anything in a user mailbox on the ISPconfig interface randomly recreate the mail folder of the mailbox.
It worked good with some mailbox and not with another ones.
I found in the database some user maildir location ended with /.
All of these mailbox recreated when I click o it on the interface and all mails gone.
I corrected the maidir fields in the database but some mailbox still recreated when I change it.

My questions:
How the ISPconfig mailbox creation method works?
How th ISPconfig check the mailbox is exist or need maildir creation?

Thanks,
Greg

 

Ok. I will retest the whole migration proccess considering this information.

Thanks for the info and the very fast response!!