Вот, впиши себе:
# vi /etc/postfix/main.cf
smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated,
reject_authenticated_sender_login_mismatch,
reject_unauth_destination,
check_policy_service unix:/var/spool/postfix/postgrey/socket,
reject_non_fqdn_recipient,
reject_invalid_hostname,
reject_unknown_recipient_domain,
reject_unknown_client,
reject_unlisted_recipient,
reject_unverified_recipient,
reject_unauth_pipelining,
reject_rbl_client cbl.abuseat.org,
reject_rbl_client dialups.mail-abuse.org,
reject_rbl_client bl.spamcop.net,
reject_rbl_client zen.spamhaus.org,
reject_rbl_client sbl-xbl.spamhaus.org,
permit
smtpd_client_restrictions =
reject_unauth_pipelining,
permit_sasl_authenticated,
permit_mynetworks,
reject_unknown_client_hostname,
permit
smtpd_helo_restrictions =
permit_mynetworks,
permit_sasl_authenticated,
reject_invalid_hostname,
reject_invalid_helo_hostname,
reject_unknown_hostname,
reject_non_fqdn_helo_hostname,
reject_unknown_helo_hostname,
permit
smtpd_sender_restrictions =
permit_sasl_authenticated,
permit_mynetworks,
reject_non_fqdn_sender,
reject_unknown_sender_domain,
permit
# vi /etc/postfix/dul_checks
/81-177-70-6\.donnetwork\.ru/i OK 81-177-70-6.donnetwork.ru (@aaanet.ru)
/([0-9]*-){3}[0-9]*(\..*){2,}/i 553 SPAM_ip-add-rr-ess_networks
/([0-9]*\.){4}(.*\.){3,}.*/i 553 SPAM_ip-add-rr-ess_networks
/.*\..*\...\.comcast\.net/i 553 SPAM_comcast-net
/.*yahoobb.*\.bbtec\.net/i 553 SPAM_yahoobb_bbtec-net
/[0-9]{12}\.bbtec\.net/i 553 SPAM_host_bbtec-net
/.*\.broadband\.hu/i 553 SPAM_broadband-hu
/client.*\..*\..*/i 553 SPAM_CLIENT
/cable.*\..*\..*/i 553 SPAM_CABLE
/pool.*\..*\..*/i 553 SPAM_POOL
/dial.*\..*\..*/i 553 SPAM_DIAL
/ppp.*\..*\..*/i 553 SPAM_PPP
/dslam.*\..*\..*/i 553 SPAM_DSLAM
/dhcp.*\..*\..*/i 553 SPAM_DHCP
/adsl\.r61\.net/i OK adsl.r61.net
/adsl\.infotecstt\.ru/i OK adsl.infotecstt.ru
/[\.-]dsl.*\..*\..*/i 553 SPAM_DSL
/[ax]dsl.*\..*\..*/i 553 SPAM_XDSL
/.*([0-9]*\.){4}cableonline\.com\.mx/i 553 SPAM_IP-cableonline-com-mx
/.*\.([0-9]*\.){4}ip\.holtonks\.net/i 553 SPAM_ip-holtonks-net
/([0-9]*-){3}[0-9]*\.fibertel\.com\.ar/i 553 SPAM_IP-fibertel-com-ar
/.*[0-9]*-[0-9]*\.fibertel\.com\.ar/i 553 SPAM_IP-fibertel-com-ar
/[0-9]*\.user\.veloxzone\.com\.br/i 553 SPAM_user-veloxzone-com-br
/[0-9]*\.customer\.alfanett\.no/i 553 SPAM_customer-alfanett-no
/.*([0-9]*-){3}[0-9]*\.telecom\.net\.ar/i 553 SPAM_host-telecom-net-ar
/.*(-[0-9]*){2}\.telpol\.net\.pl/i 553 SPAM_host-telpol-net-pl
/(.*\.){2}maxonline\.com\.sg/i 553 SPAM_host-maxonline-com-sg
/(.*-){2}.*\.fairgamemail\.us/i 553 SPAM_host-fairgamemail-us
/[0-9]*[0-9]*-\.wispnet\.net/i 553 SPAM_host-wispnet-net
/.*-.*(\..*){2}\.ne\.jp/i 553 SPAM_host-ne-jp
/[0-9]*\..*\.ne\.jp/i 553 SPAM_h09t-ne-jp
/(.*\.){3}ad\.jp/i 553 SPAM_host-ad-jp
/(.*\.){4}revip\.asianet\.co\.th/i 553 SPAM_revip-asianet-co-th
/[0-9]*\..*\.virtua\.com\.br/i 553 SPAM_host-virtua-com-br
/([0-9]*-){3}[0-9]*\.exatt\.net/i 553 SPAM_host-exatt-net
/([0-9]*\.){4}ip\.alltel\.net/i 553 SPAM_host-ip-alltel-net
/[0-9]{6,}\.chello\.../i 553 SPAM_host-chello
/.*[0-9]*\..*\.chello\.../i 553 SPAM_host-chello-xx
/.*\..*\.t-dialin\.net/i 553 SPAM_t-dialin-net
/.*\..*\.t-ipconnect\.de/i 553 SPAM_t-ipconnect-de
/([0-9]*-){2,3}[0-9]*\..*\.cgocable\.net/i 553 SPAM_host-cgocable-net
/.*\..*\.shawcable\.net/i 553 SPAM_host-shawcable-net
/p[0-9]*\.mp[0-9]*\.aaanet\.ru/i 553 SPAM_aaa_modem_pool
/([0-9]*-){2}[0-9]*\.ip\.adsl\.hu/i 553 SPAM_ip-adsl-hu
/([0-9]{1,3}\.){2}broadband4\.iol\.cz/i 553 SPAM_broadband-iol-cz
/.*\.yandex\.ru/i OK yandex.ru
, спасибо 
