david at ols
Oct 29, 2009, 2:18 AM
Post #2 of 6
(249 views)
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Hi
i would not mind about being listed at ips.backscatterer.org,
in fact we use this list as a list of real mail servers to
avoid doing things like greylisting, etc ... on that hosts
> Hi all,
>
> I am having a problem with a server getting listed on ips.backscatterer.org.
>
> I have been researchng and reviewing the config shown below, but am not 'getting it'.
>
> I want to allow bounces to local addresses only.
>
> Also, I am not so sure I understand the verify / callback process vrs. the config below.
>
> If anyone cares to review it and comment, I would be greatful.
>
> -Grant
>
> ######################################################################
> # MAIN CONFIGURATION SETTINGS #
> ######################################################################
> primary_hostname = thishost.mydomain.com
> domainlist local_domains = /etc/virtual/domains
> domainlist filtered_domains = /etc/virtual/filtered_domains
> hostlist filtering_hosts = /etc/virtual/filtering_hosts
> domainlist relay_to_domains =
> hostlist relay_from_hosts = /etc/virtual/domains
> hostlist blacklisted_domains = /etc/virtual/blacklist
> hostlist spf_bypass = /etc/virtual/spf_bypass
> hostlist whitelist = /etc/virtual/whitelist
> acl_smtp_rcpt = acl_check_rcpt
> trusted_users = mailnull:root:webmail:www
> exim_user = mailnull
> exim_group = mail
> never_users =
> host_lookup = *
> rfc1413_hosts = *
> rfc1413_query_timeout = 5s
> ignore_bounce_errors_after = 0s
> timeout_frozen_after = 0s
> auto_thaw = 6h
> return_path_remove
> untrusted_set_sender = *
> helo_allow_chars = _
> daemon_smtp_ports = 25 : 109 : 587
> bounce_message_file = /usr/local/etc/exim/bounce_message_file
> warn_message_file = /usr/local/etc/exim/warn_message_file
> return_size_limit = 10000
> bounce_return_message = false
> delay_warning = 72h
> smtp_accept_max = 100
> smtp_accept_max_per_host = 10
> smtp_return_error_details = yes
> log_selector = +incoming_interface +deliver_time +delivery_size +received_sender \
> +received_recipients +sender_on_delivery +subject +address_rewrite +all_parents
>
> # log_selector = +all
> #
> # My Attempt at greylisting
> #
>
> hide mysql_servers = localhost/exim_db/exim/password:
>
> GREYLIST_TEST = SELECT IF(NOW() > block_expires, 2, 1) \
> FROM exim_greylist \
> WHERE relay_ip = '${quote_mysql:$sender_host_address}' \
> AND from_domain = '${quote_mysql:$sender_address_domain}' \
> AND record_expires > NOW()
>
> GREYLIST_ADD = INSERT INTO exim_greylist \
> SET relay_ip = '${quote_mysql:$sender_host_address}', \
> from_domain = '${quote_mysql:$sender_address_domain}', \
> block_expires = DATE_ADD(NOW(), INTERVAL 1 MINUTE), \
> record_expires = DATE_ADD(NOW(), INTERVAL 14 DAY), \
> origin_type = 'AUTO', \
> create_time = NOW()
>
> GREYLIST_UPDATE = UPDATE exim_greylist \
> SET record_expires = DATE_ADD(now(), INTERVAL 14 DAY) \
> WHERE relay_ip = '${quote_mysql:$sender_host_address}' \
> AND from_domain = '${quote_mysql:$sender_address_domain}' \
> AND record_expires > NOW()
>
> ######################################################################
> # ACL CONFIGURATION #
> # Specifies access control lists for incoming SMTP mail #
> ######################################################################
>
> begin acl
>
> acl_check_rcpt:
> accept hosts = :
> deny local_parts = ^.*[@%!/|] : ^\\.
> accept authenticated = *
> endpass
> accept hosts = +relay_from_hosts
> endpass
>
> ############################################################################################
> # Mail is being rejected on some hosts because the mail MX is only set to a mail filtering system
> # and our server is rejecting it because some mail servers see the lesser priorty
> # MX and try to oour server directly instead of going though the mail filtering system.
> # UPDATE: All secondary MXs removed from DNS zones. Reenabled monday Oct 5 2009.
> accept domains = +filtered_domains
> hosts = +filtering_hosts
> verify = recipient
> deny message = Please use the public MX server for the domain $domain
> domains = +filtered_domains
> hosts = !+filtering_hosts
> ###########################################################################################
>
> deny senders = :
> condition = ${if > {$recipients_count}{2}{1}}
> message = Bounces must have only a single recipient
> log_message = BACKSCATTER - RECIPIENTS $recipients_count
> deny message = rejected because $sender_host_address was \
> found in our blacklist
> hosts = +blacklisted_domains
> log_message = BLACKLISTED DOMAIN FOUND IN $blacklisted_domains
> deny
> ! condition = ${lookup dnsdb{defer_never,ptr=$sender_host_address}{yes}}
> log_message = NO PTR [rDNS] FOUND FOR $sender_host_address
> message = We do not accept mail from hosts with missing \
> or incorrect rDNS.
> deny senders = :
> ! hosts = +whitelist
> dnslists = ips.backscatterer.org
> message = This message looks like a bounce, and your server is listed at \
> ips.backscatterer.org, so I assume that this is "backscatter". \
> Please configure your mail server to not send "backscatter spam". \
> For advice, try http://www.dontbouncespam.org/
> log_message = BACKSCATTER - INCOMING
> warn set acl_m2 = ${lookup mysql{GREYLIST_TEST}{$value}{0}}
> defer ! hosts = +whitelist
> ! hosts = +relay_from_hosts
> ! authenticated = *
> condition = ${if eq{$acl_m2}{0}{yes}}
> condition = ${lookup mysql{GREYLIST_ADD}{yes}{no}}
> message = Now greylisted - please try again in 1 minute.
> log_message = ADDING TO GREYLIST
> defer ! hosts = +whitelist
> ! hosts = +relay_from_hosts
> ! authenticated = *
> condition = ${if eq{$acl_m2}{1}{yes}}
> message = Still greylisted - please try again in 1 minute.
> log_message = STILL GREYLISTED
> defer
> ! hosts = +whitelist
> ! hosts = +relay_from_hosts
> ! authenticated = *
> condition = ${lookup mysql{GREYLIST_UPDATE}{no}{no}}
> message = Greylist update failed
> log_message = GREYLIST UPDATE FAILED
> require verify = sender
> accept hosts = +spf_bypass
> spf = fail
> logwrite = SPF - REFLEXION $sender_host_address is OK for \
> $sender_address_domain
> deny message = SPF - INCOMING $sender_host_address \
> is not allowed to send mail from $sender_address_domain
> spf = fail
> accept domains = +local_domains
> endpass
> message = unknown user
> verify = recipient
> accept domains = +relay_to_domains
> endpass
> message = unrouteable address
> verify = recipient
>
> ######################################################################
> # ROUTERS CONFIGURATION #
> # Specifies how addresses are handled #
> ######################################################################
> # THE ORDER IN WHICH THE ROUTERS ARE DEFINED IS IMPORTANT! #
> # An address is passed to each router in turn until it is accepted. #
> ######################################################################
>
> begin routers
>
> dnslookup_ccio:
> driver = dnslookup
> domains = ! +local_domains
> condition = ${if eq {$sender_address_domain}{ccio.on.ca}{Yes}{No}}
> transport = remote_smtp_ccio
> ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
> no_more
>
> dnslookup_owm:
> driver = dnslookup
> domains = ! +local_domains
> condition = ${if eq {$sender_host_address}{127.0.0.1} {yes}{no}}
> transport = remote_smtp_owm
> ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
> no_more
>
> dnslookup_local:
> driver = dnslookup
> domains = ! +local_domains
> condition = ${lookup {$sender_address_domain} lsearch {/etc/virtual/domains} {yes}{no}}
> transport = remote_smtp_local
> ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
> no_more
>
> dnslookup_bounce:
> driver = dnslookup
> domains = ! +local_domains
> condition = ${if eq {$sender_address_local_part}{} {yes}{no}}
> transport = remote_smtp_bounce
> ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
> no_more
>
> dnslookup_alias:
> driver = dnslookup
> domains = ! +local_domains
> transport = remote_smtp_alias
> ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
> no_more
>
> spamcheck_router:
> driver = accept
> no_verify
> condition = "${if and { {!def:h_X-Spam-Flag:} {!eq {$received_protocol}\
> {spam-scanned}}} {1}{0}}"
> transport = spamcheck
>
> virtual_alias:
> driver = redirect
> allow_defer
> allow_fail
> data = ${lookup {$local_part} lsearch {/home/$domain/mail/aliases}}
> domains = /etc/virtual/domains
> require_files = /home/$domain/mail/aliases
> condition = ${lookup {$local_part} lsearch {/home/$domain/mail/aliases} {yes}{no}}
> qualify_preserve_domain
> retry_use_local_part
> check_ancestor
> one_time
> file_transport = address_file
> pipe_transport = address_pipe
> reply_transport = address_reply
>
> autoreply_router:
> driver = accept
> require_files = /home/$domain/mail/auto-replies/$local_part
> transport = autoreply_transport
> no_verify
> unseen
>
> virtual_localuser:
> driver = accept
> require_files = /etc/virtual/$domain/passwd
> domains = /etc/virtual/domains
> condition = ${lookup {$local_part} lsearch {/etc/virtual/$domain/passwd}{$value}}
> transport = virtual_localdelivery
>
> virtual_catchall:
> driver = redirect
> allow_defer
> allow_fail
> data = ${lookup {catchall} lsearch {/home/$domain/mail/aliases}}
> domains = /etc/virtual/domains
> require_files = /home/$domain/mail/aliases
> condition = ${lookup {catchall}lsearch{/home/$domain/mail/aliases} {yes}{no}}
> qualify_preserve_domain
> retry_use_local_part
> check_ancestor
> one_time
> file_transport = address_file
> pipe_transport = address_pipe
> reply_transport = address_reply
>
> localuser:
> driver = accept
> check_local_user
> condition = ${lookup {$sender_helo_name} lsearch {/etc/virtual/domains}{YES}{NO}}
> transport = local_delivery
>
> ######################################################################
> # TRANSPORTS CONFIGURATION #
> ######################################################################
> # ORDER DOES NOT MATTER #
> # Only one appropriate transport is called for each delivery. #
> ######################################################################
> begin transports
>
> remote_smtp_ccio:
> driver = smtp
> return_path_add = true
> interface = 207.112.4.160
> helo_data = webmail.ccio.on.ca
>
> remote_smtp_owm:
> driver = smtp
> helo_data = $sender_address_domain
> # interface = ${lookup dnsdb{a=${lookup dnsdb{mxh=$sender_address_domain}}}}
> return_path_add = true
>
> remote_smtp_local:
> driver = smtp
> # interface = ${lookup dnsdb{a=${lookup dnsdb{mxh=$sender_address_domain}}}}
> helo_data = $sender_address_domain
> return_path_add = true
>
> remote_smtp_alias:
> driver = smtp
> helo_data = $parent_domain
> # interface = ${lookup dnsdb{a=${lookup dnsdb{mxh=$parent_domain}}}}
> return_path_add = true
>
> remote_smtp_bounce:
> driver = smtp
> helo_data = ${lookup dnsdb{defer_never,ptr=$interface_address}{$value}{$primary_hostname}}
> # interface = $interface_address
> return_path_add = true
>
> autoreply_transport:
> driver = pipe
> command = /usr/local/bin/autoreply.pl /home/$domain/mail/auto-replies/$local_part
>
> spamcheck:
> driver = pipe
> command = /usr/local/sbin/exim -oMr spam-scanned -bS
> use_bsmtp = true
> transport_filter = /usr/local/bin/spamc -u ${lookup{$domain}lsearch{/etc/virtual/domains_users}}
> home_directory = "/tmp"
> current_directory = "/tmp"
> # must use a privileged user to set $received_protocol on the way back in!
> user = mailnull
> group = mailnull
> log_output = true
> return_fail_output = false
> return_path_add
> message_prefix =
> message_suffix =
>
> virtual_localdelivery:
> driver = appendfile
> create_directory = true
> directory_mode = 700
> file = /var/spool/virtual/${domain}/${local_part}
> headers_remove = "Bcc"
> return_path_add
> user = ${lookup{$domain}lsearch{/etc/virtual/domains_users}}
> group = mail
> mode = 660
>
> local_delivery:
> driver = appendfile
> file = /$home/mail/$local_part
> delivery_date_add
> envelope_to_add
> return_path_add
> user = mailnull
> group = mail
> mode = 0660
>
> address_pipe:
> driver = pipe
> return_output
> user = me
>
> address_file:
> driver = appendfile
> delivery_date_add
> envelope_to_add
> return_path_add
>
> address_reply:
> driver = autoreply
>
> ######################################################################
> # RETRY CONFIGURATION #
> ######################################################################
>
> begin retry
>
> # Domain Error Retries
> # ------ ----- -------
> * quota_7d
> * quota F,72h,1h;
> * * F,30m,1m; F,90m,5m; F,22h,30m; F,144h,60m
>
> ######################################################################
> # REWRITE CONFIGURATION #
> ######################################################################
>
> # There are no rewriting specifications in this default configuration file.
>
> begin rewrite
>
> ######################################################################
> # AUTHENTICATION CONFIGURATION #
> ######################################################################
>
> # There are no authenticator specifications in this default configuration file.
>
> begin authenticators
>
> # For Netscape/Mozilla
> plain:
> driver = plaintext
> public_name = PLAIN
> server_condition = "${if and{ {!eq{$2}{}}{!eq{$3}{}} \
> {crypteq {$3} {${lookup {${local_part:$2}} lsearch \
> {/etc/virtual/${domain:$2}/passwd}\
> {$value} {*:*}}}} } {1}{0}}"
> server_set_id = $2
>
> # For Outlook/Outlook Express
> login:
> driver = plaintext
> public_name = LOGIN
> server_prompts = "Username:: : Password::"
> server_condition = "${if and{ {!eq{$1}{}}{!eq{$2}{}} \
> {crypteq {$2} {${lookup {${local_part:$1}} lsearch \
> {/etc/virtual/${domain:$1}/passwd}\
> {$value} {*:*}}}} } {1}{0}}"
> server_set_id = $1
>
> # End of Exim configuration file
--
Salu-2 y hasta pronto ...
----------------------------------------------------------------
David Saez Padros http://www.ols.es
On-Line Services 2000 S.L. telf +34 902 50 29 75
----------------------------------------------------------------
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