main.cfg:
# VIRTUAL MAILBOX
#virtual_mailbox_base = /var/spool/virtual
#virtual_mailbox_lock = dotlock
#virtual_mailbox_maps = hash:/etc/postfix/vmailbox
#virtual_maps = hash:/etc/postfix/valiases
#virtual_minimum_uid = 60000
#virtual_uid_maps = static:65534
#virtual_gid_maps = static:6

#transport_maps = hash:/etc/postfix/transport


transport:
domain.name	virtual:


vmailbox:
user@domain.name	domain.name/user