Hi, because Postfix 2.11 config has been blocking legitimate servers in the past, I added a white list before the reject_rbl_client listings.
smtpd_client_restrictions = permit_dnswl_client list.dnswl.org, reject_rbl_client ix.dnsbl.manitu.net, # reject_rbl_client zen.spamhaus.org, reject_rbl_client dul.dnsbl.sorbs.net, reject_rbl_client bl.spamcop.net # reject_rbl_client dnsbl.sorbs.net Unfortunately these dnswl lookups do not work. I'm always getting this warning in my logs. No matter which mail server connects: _____________________________________________________________________ Mar 5 09:18:13 mx0 postfix/smtpd[25201]: connect from vmx-5.kjm2.de[85.10.252.144] Mar 5 09:18:14 mx0 postfix/smtpd[25201]: warning: 144.252.10.85.list.dnswl.org: RBL lookup error: Host or domain name not found. Name service error for name=144.252.10.85.list.dnswl.org type=A: Host not found, try again Mar 5 09:18:14 mx0 postfix/smtpd[25201]: 1295120119E: client=vmx-5.kjm2.de[85.10.252.144] _____________________________________________________________________ Did I miss something in my config? Thanks, Michael mine@mx0:~$ postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no config_directory = /etc/postfix mailbox_size_limit = 0 message_size_limit = 52428800 mydestination = localhost, $myhostname myhostname = mx0.neurohr.at mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 [fe80::]/64 myorigin = $mydomain procmail_destination_recipient_limit = 1 readme_directory = no recipient_delimiter = + relayhost = smtp_bind_address6 = 2a01:4f8:151:30c7::20 smtp_tls_security_level = may smtpd_banner = $myhostname ESMTP $mail_name smtpd_client_restrictions = permit_dnswl_client list.dnswl.org, reject_rbl_client ix.dnsbl.manitu.net, reject_rbl_client dul.dnsbl.sorbs.net, reject_rbl_client bl.spamcop.net smtpd_recipient_restrictions = permit_sasl_authenticated, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_client_hostname, reject_unknown_sender_domain, reject_unknown_recipient_domain, permit_mynetworks, reject_unauth_destination, permit smtpd_sasl_auth_enable = yes smtpd_sasl_path = private/auth smtpd_sasl_type = dovecot smtpd_tls_CAfile = /etc/ssl/private/mailserver/ca-bundle.crt smtpd_tls_auth_only = yes smtpd_tls_cert_file = /etc/ssl/private/mailserver/mx0.neurohr.at.pem smtpd_tls_key_file = /etc/ssl/private/mailserver/mx0.neurohr.at.key smtpd_tls_received_header = yes smtpd_tls_security_level = may transport_maps = hash:/etc/postfix/transport virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf virtual_transport = lmtp:unix:private/dovecot-lmtp