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feat: Postfix permit DSN (Delivery Status Notification) only on authenticated ports (465 + 587) (#3572)

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* add POSTFIX_DSN

* add tests for POSTFIX_DSN

* Revert "add POSTFIX_DSN"

This reverts commit d5bd0e9117.

* discard DSN requests on unauthenticated ports

* make tests work with overrides instead of ENV

* Apply suggestions from code review

* fix test inconsistencies

---------

Co-authored-by: allddd <allddd@proton.me>
Co-authored-by: Brennan Kinney <5098581+polarathene@users.noreply.github.com>
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allddd 2023-10-22 15:16:41 +02:00 • committed by GitHub
parent 811a769845
commit eacc379cf1
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target/postfix/main.cf
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@ -54,6 +54,7 @@ smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_una
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, reject_unauth_pipelining, reject_invalid_helo_hostname, reject_non_fqdn_helo_hostname, reject_unknown_recipient_domain
smtpd_client_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_unauth_pipelining
smtpd_sender_restrictions = $dms_smtpd_sender_restrictions
smtpd_discard_ehlo_keywords = silent-discard, dsn
disable_vrfy_command = yes
# Custom defined parameters for DMS: