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* OpenDMARC: Adjust configuration to bullseye.Guilhem Moulin2024-09-081
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* MX: Port to Debian 10.Guilhem Moulin2020-05-161
| | | | | | | | For postfix, don't defer if "abused legit". (I.e., DBL return code in the 127.0.1.100+ range.) This used to work for Postfix 3.1.14 (Stretch) but for 3.4.8 (Buster) the 'defer_if_reject' also applies to $smtpd_relay_restrictions, to reject_unauth_destination & reject_unlisted_recipient in particular.
* MX: Install OpenDMARC to add Authentication-Results headers.Guilhem Moulin2020-05-161
On the infrastructure boundary. We don't reject/quarantine as it would affect members who forward their mail sent to <user@example.com> to <user@fripost.org>. Members can install Sieve rules to send any messages with failed Authentication-Results headers directly in their spambox.