master.cf con domainkeys

smtp      inet  n       -       n       -       -       smtpd -v
	-o smtpd_proxy_filter=127.0.0.1:10025
	-o smtpd_client_connection_count_limit=10
127.0.0.1:10026        inet    n	-	n	-	-	smtpd
	-o smtpd_authorized_xforward_hosts=127.0.0.0/8
	-o smtpd_client_restrictions=
	-o smtpd_helo_restrictions=
	-o smtpd_sender_restrictions=
	-o smtpd_recipient_restrictions=permit_mynetworks,reject
	-o smtpd_data_restrictions=
	-o mynetworks=127.0.0.0/8
	-o receive_override_options=no_unknown_recipient_checks
submission inet n       -       n       -       -       smtpd
	-o smtpd_etrn_restrictions=reject
	-o smtpd_sasl_auth_enable=yes
	-o content_filter=dksign:[127.0.0.1]:10027
	-o receive_override_options=no_address_mappings
	-o smtpd_recipient_restrictions=permit_mynetworks,permit_sasl_authenticated,reject
dksign	unix	-	-	n	-	10	smtp
	-o smtp_send_xforward_command=yes
	-o smtp_discard_ehlo_keywords=8bitmime
127.0.0.1:10028	inet	n	-	n	-	10	smtpd
	-o content_filter=
	-o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
	-o smtpd_helo_restrictions=
	-o smtpd_client_restrictions=
	-o smtpd_sender_restrictions=
	-o smtpd_recipient_restrictions=permit_mynetworks,reject
	-o mynetworks=127.0.0.0/8
	-o smtpd_authorized_xforward_hosts=127.0.0.0/8