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postfix: reject_sender_login_mismatch prevents unauth emails to other miab users

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jvolkenant 2018-10-31 09:07:49 -07:00
parent 16f38042ec
commit 244d1dfc0c
1 changed files with 2 additions and 1 deletions
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setup/mail-postfix.sh
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@ -192,6 +192,7 @@ tools/editconf.py /etc/postfix/main.cf virtual_transport=lmtp:[127.0.0.1]:10025
# * `reject_rbl_client`: Reject connections from IP addresses blacklisted in zen.spamhaus.org
# * `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.
# * `reject_sender_login_mismatch`: Prevents unauthenticated users from sending mail to other local users.
#
# Notes: #NODOC
# permit_dnswl_client can pass through mail from whitelisted IP addresses, which would be good to put before greylisting #NODOC
@ -199,7 +200,7 @@ tools/editconf.py /etc/postfix/main.cf virtual_transport=lmtp:[127.0.0.1]:10025
# 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_sender_restrictions="reject_non_fqdn_sender,reject_unknown_sender_domain,reject_authenticated_sender_login_mismatch,reject_rhsbl_sender dbl.spamhaus.org,reject_sender_login_mismatch" \
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"
# Postfix connects to Postgrey on the 127.0.0.1 interface specifically. Ensure that