Есть Postfix + Mysql.Как для определенного пользователя разрешить отправку писем только на домены .ru и .su ?

Вот конфиг:

alias_database = dbm:/etc/mail/aliases
bounce_size_limit = 2000
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
debug_peer_list = intra.net
disable_vrfy_command = yes
home_mailbox = Maildir/
html_directory = no
inet_interfaces = all
mail_owner = postfix
mail_spool_directory = /var/spool/mail
mailq_path = /usr/local/bin/mailq
manpage_directory = /usr/local/man
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain,
mydomain = intra.net
myhostname = mail.star.ru
mynetworks = /etc/postfix/mynetworks
mynetworks_style = host
newaliases_path = /usr/local/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = no
relay_domains = $mydomain
relayhost = [192.168.2.5]
sample_directory = /usr/local/etc/postfix
sendmail_path = /usr/local/sbin/sendmail
setgid_group = postdrop
smtp_always_send_ehlo = yes
smtpd_banner = $domain ESMTP $mail_name
smtpd_hard_error_limit = 8
smtpd_helo_required = yes
smtpd_recipient_restrictions = permit_mynetworks,reject_unauth_destination
unknown_local_recipient_reject_code = 550
virtual_alias_maps = mysql:/usr/local/etc/postfix/mysql_virtual_alias_maps.cf
virtual_gid_maps = static:1005;
virtual_mailbox_base = /usr/local/virtual
virtual_mailbox_domains = mysql:/usr/local/etc/postfix/mysql_virtual_domains_maps.cf
virtual_mailbox_limit = 51200000
virtual_mailbox_maps = mysql:/usr/local/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_minimum_uid = 1001
virtual_transport = virtual
virtual_uid_maps = static:1004