Before we added any domains and email aliases I switched from postfix to sendmail.
Now the bug......
Failed to delete users : Failed to query Postfix config command to get the current value of parameter home_mailbox:
Call Stack Trace
File Line Function
/usr/share/webmin/postfix/postfix-lib.pl 147 postfix::error
/usr/share/webmin/postfix/postfix-lib.pl 839 postfix::get_current_value
/usr/share/webmin/mailboxes/mailboxes-lib.pl 187 postfix::postfix_mail_system
/usr/share/webmin/mailboxes/useradmin_update.pl 63 mailboxes::get_mail_style
(eval 94) 2 mailboxes::useradmin_delete_user
../web-lib-funcs.pl 2159 (eval)
/usr/share/webmin/useradmin/user-lib.pl 704 useradmin::foreign_call
(eval 63) 2 useradmin::other_modules
../web-lib-funcs.pl 2159 (eval)
/usr/share/webmin/virtual-server/delete_users.cgi 57 virtual_server::foreign_call
(eval 21) 6 (eval)
/usr/share/webmin/miniserv.pl 2043 (eval)
/usr/share/webmin/miniserv.pl 709 miniserv::handle_request