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take into account spamhaus return codes on blocklist check for postfix

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KiekerJan 2023-11-25 11:23:49 +01:00 committed by Joshua Tauberer
parent f73c314e65
commit 3072035d01
1 changed files with 3 additions and 2 deletions
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setup/mail-postfix.sh
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@ -224,14 +224,15 @@ tools/editconf.py /etc/postfix/main.cf -e lmtp_destination_recipient_limit=
# * `reject_unlisted_recipient`: Although Postfix will reject mail to unknown recipients, it's nicer to reject such mail ahead of greylisting rather than after.
# * `check_policy_service`: Apply greylisting using postgrey.
#
# Note the spamhaus rbl return codes are taken into account as adviced here: https://docs.spamhaus.com/datasets/docs/source/40-real-world-usage/PublicMirrors/MTAs/020-Postfix.html
# Notes: #NODOC
# permit_dnswl_client can pass through mail from whitelisted IP addresses, which would be good to put before greylisting #NODOC
# so these IPs get mail delivered quickly. But when an IP is not listed in the permit_dnswl_client list (i.e. it is not #NODOC
# whitelisted) then postfix does a DEFER_IF_REJECT, which results in all "unknown user" sorts of messages turning into #NODOC
# "450 4.7.1 Client host rejected: Service unavailable". This is a retry code, so the mail doesn't properly bounce. #NODOC
tools/editconf.py /etc/postfix/main.cf \
smtpd_sender_restrictions="reject_non_fqdn_sender,reject_unknown_sender_domain,reject_authenticated_sender_login_mismatch,reject_rhsbl_sender dbl.spamhaus.org" \
smtpd_recipient_restrictions=permit_sasl_authenticated,permit_mynetworks,"reject_rbl_client zen.spamhaus.org",reject_unlisted_recipient,"check_policy_service inet:127.0.0.1:10023"
smtpd_sender_restrictions="reject_non_fqdn_sender,reject_unknown_sender_domain,reject_authenticated_sender_login_mismatch,reject_rhsbl_sender dbl.spamhaus.org=127.0.1.[2..99]" \
smtpd_recipient_restrictions="permit_sasl_authenticated,permit_mynetworks,reject_rbl_client zen.spamhaus.org=127.0.0.[2..11],reject_unlisted_recipient,check_policy_service inet:127.0.0.1:10023"
# Postfix connects to Postgrey on the 127.0.0.1 interface specifically. Ensure that
# Postgrey listens on the same interface (and not IPv6, for instance).