Decision sorb: the mail hardening carried over from the mrtc diagnosis becomes an
issue. Writing it up corrected the premise the AAR and dns-soll.md carried:
#0006 hardened axion1337.DE, the zone with the real mailboxes, and it stands at
p=reject. The platform zone .chat was never its subject and still resolves its
_dmarc as a CNAME into IONOS' shared p=none - so the policy for our own domain is
set by IONOS, and RFC 7489 passes that none down to all seven service names.
Two senders are documented rather than assumed: Authentik as gamemaster@ via
IONOS SMTP (DKIM-covered), and maintenance-notify as wartung@ over an msmtp
config whose provider the template leaves open. That second path is why the issue
puts "clarify the senders" ahead of any policy change - p=reject before that
question is answered breaks maintenance mail silently.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Thore CimbalandClaude Opus 5
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