|
report must never open source.eml, so parse decides once what may be
published and report formats only what it is given. To, Cc, Delivered-To and
X-Original-To are absent by construction rather than stripped.
Received is cut to the boundary hop alone, in both directions. Above it are
our own relays; below it is the attacker's own writing, and a forged chain
names an innocent third party there, so publishing a hop below the boundary
puts someone else's address into a report a desk will act on. That is the
third property applied to disclosure rather than to sending_ip().
Truncating the chain was not sufficient on its own: the surviving line is
written by our own relay and records the envelope recipient in its optional
"for <addr>" clause, so the whitelist alone would have published the
victim's address verbatim in the one header a report reproduces in full.
The clause is removed and the rest of the hop kept.
The manifest-wide "no example.org" assertion is narrowed to the headers
block only, where the whitelist deliberately publishes our receiving relay's
name in a by/authserv-id clause. The address itself is still barred there,
asserted separately.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Xj1ayFRSUQ2u7cwb3S4axE
|
