为什么我的postfix不会产生邮件目录

NetDC

我用debian/squeeze + postfix + ldap搭建邮件系统，使用独立域名+虚拟用户的方式，可是奇怪的是怎么都无法产生邮件目录，而所有发送的邮件都在virtual_mailbox_base目录下产生一个叫Maildir的文件（不是文件夹）中。
main.cf配置如下：

# See /usr/share/postfix/main.cf.dist for a commented, more complete version

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

myhostname = mail.example.tld
relayhost =
mynetworks = 127.0.0.0/8
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
disable_vrfy_command = yes


ldap_bind_dn = cn=phamm,o=hosting,dc=example,dc=tld
ldap_bind_pw = rhx
ldap_search_base = o=hosting,dc=example,dc=tld
ldap_domain = dc=example,dc=tld
ldap_server_host = localhost
ldap_server_port = 389
ldap_version = 3

# transports
transport_server_host = $ldap_server_host
transport_search_base = $ldap_search_base
transport_query_filter = (&(&(vd=%s)(objectClass=VirtualDomain))(accountActive=TRUE)(delete=FALSE))
transport_result_attribute = postfixTransport
transport_cache = no
transport_bind = yes
transport_scope = one
transport_bind_dn = $ldap_bind_dn
transport_bind_pw = $ldap_bind_pw
transport_version = $ldap_version

# aliases
aliases_server_host = $ldap_server_host
aliases_search_base = $ldap_search_base
aliases_query_filter = (&(&(objectClass=VirtualMailAlias)(mail=%s))(accountActive=TRUE))
aliases_result_attribute = maildrop
aliases_bind = yes
aliases_cache = no
aliases_bind_dn = $ldap_bind_dn
aliases_bind_pw = $ldap_bind_pw
aliases_version = $ldap_version

# VirtualForward
virtualforward_server_host = $ldap_server_host
virtualforward_search_base = $ldap_search_base
virtualforward_query_filter = (&(&(objectClass=VirtualMailAccount)(mail=%s))(vacationActive=FALSE)(forwardActive=TRUE)(accountActive=TRUE)(delete=FALSE))
virtualforward_result_attribute = maildrop
virtualforward_bind = yes
virtualforward_cache = no
virtualforward_bind_dn = $ldap_bind_dn
virtualforward_bind_pw = $ldap_bind_pw
virtualforward_version = $ldap_version

# Accounts
accounts_server_host = $ldap_server_host
accounts_search_base = $ldap_search_base
accounts_query_filter = (&(&(objectClass=VirtualMailAccount)(mail=%s))(forwardActive=FALSE)(accountActive=TRUE)(delete=FALSE))
accounts_result_attribute = mailbox
accounts_cache = no
accounts_bind = yes
accounts_bind_dn = $ldap_bind_dn
accounts_bind_pw = $ldap_bind_pw
accounts_version = $ldap_version

accountsmap_server_host = $ldap_server_host
accountsmap_search_base = $ldap_search_base
accountsmap_query_filter = (&(&(objectClass=VirtualMailAccount)(mail=%s))(forwardActive=FALSE)(accountActive=TRUE)(delete=FALSE))
accountsmap_result_attribute = mail
accountsmap_cache = no
accountsmap_bind = yes
accountsmap_bind_dn = $ldap_bind_dn
accountsmap_bind_pw = $ldap_bind_pw
accountsmap_version = $ldap_version

# virtual quota
quota_server_host = $ldap_server_host
quota_search_base = $ldap_search_base
quota_query_filter = (&(&(objectClass=VirtualMailAccount)(mail=%s))(accountActive=TRUE)(delete=FALSE))
quota_result_attribute = quota
quota_cache = no
quota_bind = yes
quota_bind_dn = $ldap_bind_dn
quota_bind_pw = $ldap_bind_pw
quota_version = $ldap_version

# Mail to reply for gnarwl and mail to forward during vacation
recipient_bcc_maps = ldap:vma
vma_server_host = $ldap_server_host
vma_search_base = $ldap_search_base
vma_query_filter = (&(&(objectClass=VirtualMailAccount)(mail=%s))(vacationActive=TRUE)(forwardActive=FALSE)(accountActive=TRUE)(delete=FALSE))
vma_result_attribute = mailAutoreply
vma_cache = no
vma_bind = yes
vma_bind_dn = $ldap_bind_dn
vma_bind_pw = $ldap_bind_pw
vma_version = $ldap_version

# transport_maps
maildrop_destination_concurrency_limit = 2
maildrop_destination_recipient_limit = 1
transport_maps = hash:/etc/postfix/transport, ldap:transport
mydestination = $transport_maps, localhost, $myhostname, localhost.$mydomain, $mydomain
virtual_alias_maps = hash:/etc/postfix/virtual, ldap:virtualforward, ldap:aliases, ldap:accountsmap

# virtual accounts for delivery
virtual_mailbox_base = /home/vmail/domains
virtual_mailbox_maps = ldap:accounts
virtual_minimum_uid = 1001
virtual_uid_maps = static:1001
virtual_gid_maps = static:1001

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

NetDC

知道怎么回事了，配置的最后一行有问题，$alias_maps应该是$virtual_alias_maps。