docs/own-mta-builds-2026-10-15.md weighs patched builds of Postfix and
OpenDKIM against what the panel works around. No Postfix limit needs a
patch (the panel reads it through the interfaces it offers); every limit
worked around is OpenDKIM's, a project with no release since 2018, three
2026 CVEs open in every Debian suite and no one answering (read in
dev/upstream: dkim_process_set runs on a tenant's DKIM-Signature header
in signing mode too). Bookworm is in LTS since 2026-07-12 and its Postfix
3.7.11 lacks the June, August and September 2026 upstream security
batches, which carry no CVE ids.
Proposed as candidates: port25-bare-newline (smtpd_forbid_bare_newline
defaults to no on 3.7; our smtp/inet block does not set it), base-trixie
(postfix 3.10.13; 331 citation lines to re-read), panel-dkim-signing
(go-msgauth/dkim in the panel's milter; OpenDKIM, the syslog relay and
the parser port removed, about 1,500 lines).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
