postfix+amavis+spamassassin

 $ postconf | grep content_filter 

 $ netstat -ntl 

unknown_local_recipient_reject_code = 550 mynetworks = 192.168.0.0/24 smtpd_recipient_restrictions = check_sender_access hash:/etc/postfix/whitelist, permit_mynetworks, reject_unauth_destination, reject_unauth_pipelining, reject_non_fqdn_recipient, reject_unknown_recipient_domain, reject_unknown_sender_domain, reject_invalid_hostname, reject_unlisted_recipient, check_policy_service unix:/var/spool/postfix/postgrey/socket, check_policy_service unix:private/policy, permit

relay_domains = domain2.tld

smtpd_client_restrictions = permit_mynetworks, permit_sasl_authenticated,

reject_invalid_hostname, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_destination, check_policy_service unix:/var/spool/postfix/postgrey/socket, reject_rbl_client zen.spamhaus.org, reject_rbl_client bl.spamcop.net, reject_rbl_client cbl.abuseat.org, permit

sender_dependent_relayhost_maps = hash:/etc/postfix/relaymap transport_maps = hash:/etc/postfix/transport

alias_maps = hash:/etc/aliases

alias_database = hash:/etc/aliases

local_recipient_maps =

debug_peer_level = 2

debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5

sendmail_path = /usr/sbin/sendmail.postfix

newaliases_path = /usr/bin/newaliases.postfix

mailq_path = /usr/bin/mailq.postfix

setgid_group = postdrop

html_directory = no

manpage_directory = /usr/share/man

content_filter=amavisfeed:[127.0.0.1]:10024 mime_header_checks = regexp:/etc/postfix/header_checks header_checks = regexp:/etc/postfix/header_checks mailbox_size_limit = 51200000 message_size_limit = 40960000 virtual_mailbox_limit = 51200000

disable_vrfy_command = yes

$sa_tag_level_deflt  = 5.0;  # add spam info headers if at, or above that level
$sa_tag2_level_deflt = 5.0;  # add 'spam detected' headers at that level
$sa_kill_level_deflt = 5.0;  # triggers spam evasive actions (e.g. blocks mail)

$sa_tag_level_deflt  = 3.0;  # add spam info headers if at, or above that level
$sa_tag2_level_deflt = 4.0;  # add 'spam detected' headers at that level
$sa_kill_level_deflt = 5.0;  # triggers spam evasive actions (e.g. blocks mail)

$sa_tag_level_deflt  = 2.0;  # add spam info headers if at, or above that level
$sa_tag2_level_deflt = 6.2;  # add 'spam detected' headers at that level
$sa_kill_level_deflt = 8.9;  # triggers spam evasive actions (e.g. blocks mail)
$sa_dsn_cutoff_level = 10;   # spam level beyond which a DSN is not sent

@local_domains_acl = ( ".mydomain.example.org", "localhost" );

@local_domains_maps = ( [".$mydomain"] );