refused messages: the page shows what Postfix wrote (stage 2b, 0009)

The Delivery log box of every refused row said "This message never reached
the queue, so Postfix wrote no delivery lines for it" - untrue: Postfix
wrote a line for each. The owner, 2026-10-13: the box is required on every
message page. Pictured for him first (dev/shots, the refused variant of
out-message: wrong From with its queue id lines, rate-limited with the
NOQUEUE line); the variant has no mockup screen of its own - the guard ties
screens to pages, and its outline is out-message's.

- Wrong From: cleanup gives the message a queue id before the headers are
  judged; the sender check reads {i} at end-of-headers and writes it on the
  refused row. Its lines - stored under the id like any other's - are on the
  page, but only those from 10 minutes before to 1 minute after the refusal
  (store.SendLogLines for a rejected row): Postfix frees the id at once, and
  a later message with it lends nothing. No mail.log fallback for a refused
  row, for the same reason.
- Rate-limited and wrong client: refused at MAIL FROM, no queue id. Migration
  0009 adds send_log.refusal_line; logtail.refusalLines matches smtpd's
  "NOQUEUE: milter-reject: MAIL from ...; from=<...>" (not port 25's, not
  CONNECT/EHLO) and store.AttachRefusalLine puts it on the newest refused row
  of that sender (and login, when the line names it) within two minutes; a
  line whose row is not written yet waits up to 30 s (retried at each pass).
- The page: the queue id fact says "given, the message was not queued" or
  "none - refused at MAIL FROM, before one is given"; the box's caption is
  "The line from mail.log for this refusal" for the latter; a row from
  before says the line was not kept. LogLineLevel colours a refusal by its
  reply: 5xx red, 4xx amber (IPv6 clients included). The id in the fact is
  not muted as in the picture: the kit has no muted inline.

Tests: store (attach by sender, login, time; not a queued row, not one an
hour off; a refused row's lines are its own minutes); logtail (attach, wait
and retry, port 25 and other lines ignored); milter (the refused row carries
{i}); view (facts, caption, line levels); handlers (the line on the page,
the sentence without it). e2e refusals_show_postfixs_line: a client-address
refusal made there, and the pages of a wrong From, a rate-limited and a
wrong client refusal each show Postfix's line.

schema-migrations row 9, CHANGELOG [Unreleased], audit plan line ticked,
roadmap 25/62.
Evidence on the test server for this tree: make e2e exit 0 (the new case
in 5.4 s); go test ./... ok but for two schema tests, fixed after the run
(the schema at 0009) - store tests ok locally; the full run follows before
the push.

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

internal/web/handlers/handlers_monitor.go

@@ -241,6 +241,12 @@ const deliveryLogMargin = 24 * time.Hour
 // reported as a fault, and that one is logged for the operator as well.
 func (h *Handlers) deliveryLog(row store.SendLogRow) ([]view.LogLine, string) {
 	if row.QueueID == "" {
+		if row.RefusalLine != "" {
+			return logLines([]string{row.RefusalLine}), ""
+		}
+		if row.Status == store.StatusRejected {
+			return nil, "Postfix's line about this refusal is not stored: the message was refused before version 2.5.1, or the line was never read."
+		}
 		return nil, "This message never reached the queue, so Postfix wrote no delivery lines for it."
 	}
 	stored, err := h.store.SendLogLines(row, h.cfg.RetryPolicy.LongestLifetime()+deliveryLogMargin, deliveryLogLines)
@@ -252,7 +258,9 @@ func (h *Handlers) deliveryLog(row store.SendLogRow) ([]view.LogLine, string) {
 	for i, l := range stored {
 		lines[i] = l.Line
 	}
-	if len(lines) == 0 {
+	// A refused message's id was freed at once and may be another's by now:
+	// what was not stored with the row is not looked for in the log.
+	if len(lines) == 0 && row.Status != store.StatusRejected {
 		lines, err = logtail.QueueLines(h.cfg.MailLogPath, row.QueueID, deliveryLogLines)
 		if err != nil && !errors.Is(err, fs.ErrNotExist) {
 			logf("panel: delivery log %s: %v", row.QueueID, err)
@@ -262,6 +270,11 @@ func (h *Handlers) deliveryLog(row store.SendLogRow) ([]view.LogLine, string) {
 	if len(lines) == 0 {
 		return nil, "Nothing is stored for this queue id and nothing is in the current mail log. Lines are kept with the row since version 2.2.0; a message accepted before that had them only in mail.log, which has since rotated."
 	}
+	return logLines(lines), ""
+}
+
+// logLines are lines of mail.log as the delivery log box shows them.
+func logLines(lines []string) []view.LogLine {
 	out := make([]view.LogLine, len(lines))
 	for i, line := range lines {
 		// A line whose head is not a timestamp the log format recognises keeps its
@@ -269,7 +282,7 @@ func (h *Handlers) deliveryLog(row store.SendLogRow) ([]view.LogLine, string) {
 		stamp, rest := logtail.SplitTimestamp(line)
 		out[i] = view.LogLine{Time: stamp, Text: rest, Level: view.LogLineLevel(rest)}
 	}
-	return out, ""
+	return out
 }
 
 // deliveriesBackURL rebuilds the delivery-log URL a detail page was opened