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Linus Rath
cf0eb03c4a
Stalwart does no BIMI, so sender icons were only ever favicons, which anyone controls for any domain. The webmail server now does the receiver side itself at /api/bimi, and avatars ask it only for messages whose own Authentication-Results say dmarc=pass for the exact From domain. - `lib/bimi/`: DMARC policy check (quarantine or reject, pct=100, the parent domain's sp and p for subdomains), the assertion record with fallback to the parent domain, mark certificate validation (chain to pinned DigiCert, GlobalSign and SSL.com VMC roots, BIMI key purpose, validity, SAN, SCTs present, CRL revocation, logo from the logotype extension), SVG Tiny PS checks and rendering to PNG, caching - logos backed only by the DNS record show by default; the admin setting "Require a mark certificate" (`BIMI_REQUIRE_CERTIFICATE`) limits them to VMC and CMC backed ones - a check mark beside the sender's name for certificate-backed logos - avatars try contact photo, BIMI logo, plugin avatar, favicon; the sender warning shield still wins, and logos follow the sender icons setting and the no-third-party-traffic mode - the two-label public suffix list moved to `lib/root-domain.ts` SCT signatures are not verified and only the default selector is used.