K bharathan schrieb: > hi all > my relay smtp out got listed with backscatterer.org > <http://backscatterer.org>; the following is my postconf: > > alias_maps = hash:/etc/aliases > biff = no > canonical_maps = hash:/etc/postfix/canonical > command_directory = /usr/sbin > config_directory = /etc/postfix > content_filter = amavisd-new:[127.0.0.1]:10024 > daemon_directory = /usr/lib/postfix > debug_peer_level = 2 > defer_transports = > disable_dns_lookups = no > disable_mime_output_conversion = no > disable_vrfy_command = yes > home_mailbox = Maildir/ > html_directory = /usr/share/doc/packages/postfix23/html > inet_interfaces = all > inet_protocols = all > local_recipient_maps = > local_transport = error:local mail delivery is disabled > mail_owner = postfix > mail_spool_directory = /var/mail > mailbox_command = > mailbox_size_limit = 0 > mailbox_transport = > mailq_path = /usr/bin/mailq > manpage_directory = /usr/share/man > masquerade_classes = envelope_sender, header_sender, header_recipient > masquerade_domains = > masquerade_exceptions = root > message_size_limit = 25600000 > mydestination = > myhostname = smtp.example.com <http://smtp.example.com> > mynetworks = 192.168.1.0/24 <http://192.168.1.0/24> 192.168.20.0/24 > <http://192.168.20.0/24> 127.0.0.0/8 <http://127.0.0.0/8> > mynetworks_style = subnet > myorigin = example.com <http://example.com> > newaliases_path = /usr/bin/newaliases > queue_directory = /var/spool/postfix > readme_directory = /usr/share/doc/packages/postfix23/README_FILES > relay_domains = > relay_recipient_maps = hash:/etc/postfix/relay_recipients > relocated_maps = hash:/etc/postfix/relocated > sample_directory = /usr/share/doc/packages/postfix23/samples > sender_canonical_maps = hash:/etc/postfix/sender_canonical > sendmail_path = /usr/sbin/sendmail > setgid_group = maildrop > smtp_sasl_auth_enable = no > smtp_use_tls = no > smtpd_client_restrictions = > > smtpd_data_restrictions = > reject_multi_recipient_bounce > reject_unauth_pipelining > permit > > smtpd_helo_required = yes > smtpd_helo_restrictions = > smtpd_recipient_restrictions = > reject_non_fqdn_recipient > reject_non_fqdn_sender > reject_unknown_sender_domain > reject_unknown_recipient_domain > permit_mynetworks > reject_unauth_destination > > check_recipient_access hash:/etc/postfix/roleaccount_exceptions > reject_non_fqdn_hostname > reject_invalid_hostname > check_helo_access pcre:/etc/postfix/helo_checks > reject_rbl_client zen.spamhaus.org <http://zen.spamhaus.org> permit > smtpd_sasl_auth_enable = no > > smtpd_sender_restrictions = > check_sender_access hash:/etc/postfix/mydomains > check_recipient_access hash:/etc/postfix/allowed_forwards > reject_unauth_destination > smtpd_use_tls = no > strict_8bitmime = no > strict_rfc821_envelopes = no > transport_maps = hash:/etc/postfix/transport > unknown_local_recipient_reject_code = 550 > > the server got a list of domains (those domains mail servers use this > server as relayhost)to relay out and does only smtp out; what could be > wrong in the above config; appreciate ur assistance upon this
thats the reason, guess your relay clients get lots of i.e spam/virus mail,perhaps they bounce after allready got the mail for nonexistent domains/mailaccounts etc ( do they have catch alls, buggy virus solutions , such are mail the faked sender for info by marking mail as spam , virus etc? ) vacations and other nonsense in, and deliver out over your relay look your logs,do analyze, filter spam/virus etc before send out perhaps dont relay by ip, use sasl auth to restrict relay clients to mail domains which your relay has i.e mx delegated After all its easy to get on that rbl, dont be to much afraid of it, but look out for systematic setup bugs of your clients by looking at your logs, perhaps set hold outgoing mails for that a few hours, dont accept mails from nonexisting domains from clients etc, listing can have many reasons > > thanks > > -bharathan > -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria