test-email: a test message from Server › Health

Decided by the owner on 2026-10-13 (out of preflight); the sender is his
choice of 2026-10-16 ("Да, адрес годится"); mockups e92769f, e3b2501,
8f0ccf9, the route guard 75f97c9.

Card 09 on Health, in the right stack's static end (the left stack is
polled whole): one recipient and Send. HandleTestMessage (global role)
takes one address (validate.AccountEmail - no list, nothing that reads as
an option), at most ten an hour counted from the send log, writes the
message's send-log row first (store.InsertTestMessage: queued, the
hostname as domain, no application, no queue id), awaits its Message-ID
(logtail.AwaitMessageID) and hands it to sendmail as notifications go
(notify.Mailer.SendWithID: postmaster@ the hostname, signed by the local
socket with the key of the server's own name). The browser lands on the
row; the tailer gives it its queue id from cleanup's message-id= line
(src/cleanup/cleanup_message.c:639) and from then on its delivery lines
its status. Postfix refusing the hand-over removes the row; sendmail out
of time keeps it (postdrop may have queued it). The sweep closes a row
whose id was never seen once it is no longer awaited
(CloseUnmatchedTestMessages); an id awaited past ten minutes is not taken.

Reviewed for security before the commit (2026-10-17): no high or medium;
its three low findings are fixed in this commit (the unmatched row's
close, the awaited id's age, the timeout keeping the row) and the
security.md bullet says how the queue id is matched.

Tests: TestTestMessage (refusals, the row and the page, Postfix refusing,
the hourly ten), TestTestMessageTimeoutKeepsTheRow, TestTestMessageRows,
TestCloseUnmatchedTestMessages, TestAwaitedMessageID,
TestRunGivesTheTestMessageItsQueueID, TestHealthTestMessageCard; e2e sends
one to the sink: the row is sent with a long queue id, the sink has it
signed d=mail.e2e.test. go vet + go test (26 packages) and make e2e on the
test server for this tree.

Docs: help (word for word with the mockup), guide § Overview and Health,
architecture § Log tailer, security.md, CHANGELOG [Unreleased] § Added,
roadmap row done.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/roadmap.md

@@ -30,7 +30,7 @@ in `git log` and [CHANGELOG.md](../CHANGELOG.md).
 |---|---|---|---|---|
 | inbound-upstream-result | Inbound › Log shows what the upstream answered: sent, deferred, bounced, with its last reply | shipped `2.10.0` | 7/7 | [plans/inbound-upstream-result.md](plans/inbound-upstream-result.md) |
 | health-setup-checks | Server › Health also checks the certificate's name, Postfix's greeting and the trusted proxy (was preflight) | shipped `2.11.0` | — | — |
-| test-email | Send a test message from the panel (was preflight) | agreed (2026-10-13) | — | — |
+| test-email | Send a test message from the panel (was preflight) | done 2026-10-17, unreleased | — | — |
 | inbound-antispam-panel | Inbound antispam journal + allow/deny lists | shipped `2.1.0` | 12/12 | [plans/inbound-antispam-panel.md](plans/inbound-antispam-panel.md) |
 | origin-strict | Refuse a state-changing request that carries neither `Sec-Fetch-Site` nor `Origin` (was csrf-tokens) | shipped `2.10.4` | — | — |
 | backup-reauth | Ask for the account password before a backup or a domain export is downloaded | shipped `2.10.3` | — | — |
@@ -211,6 +211,13 @@ the mockup; mockup-first.
 rate-limited and refuses a recipient list, and it passes a security review -
 a form that sends mail is a new surface.
 
+**Done (2026-10-17):** from `postmaster@` the hostname (the owner,
+2026-10-16: "Да, адрес годится"), card 09 on Health in the static stack
+(mockups `e92769f`, `e3b2501`, `8f0ccf9`). The row is written before the
+hand-over and learns its queue id from cleanup's Message-ID line
+(`logtail.AwaitMessageID`); the browser lands on it. One address
+(`validate.AccountEmail`), ten an hour from the send log, global role.
+
 **Version:** `2.x` MINOR; `agreed`.
 
 ---