virtual_mailbox_base = /var/mail
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf
virtual_uid_maps = static:1001
virtual_gid_maps = static:1001
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual-alias-maps.cf
virtual_transport = dovecot