diff --git a/docs/email-deliverability-runbook.md b/docs/email-deliverability-runbook.md
index 4797dd2..33d248d 100644
--- a/docs/email-deliverability-runbook.md
+++ b/docs/email-deliverability-runbook.md
@@ -67,18 +67,29 @@ daily volume cap. Result:
 
 ## Fresh-IP warmup discipline (the rules)
 
-1. **Small audiences.** Day 0-3: a few hundred TOTAL per day, not per campaign.
-   Lower the `limit` values in `build_trucking_campaigns.py` segment specs while
-   warming.
-2. **Best recipients first.** Only verified / engaged addresses. Gmail and
-   Microsoft only (Yahoo family already excluded).
-3. **Scrub hard bounces immediately.** `550 5.1.1` (no such user), full mailbox,
-   "not our customer" all hurt reputation signals.
-4. **Watch the signals daily** (see commands below). If Gmail `550-5.7.1` or
+The historical mail.log proves these IPs sustain ~2,500 sends/day at 68-76%
+delivery once warm (May 19-21). Collapses only ever came from 17k-29k spikes.
+So we ramp ASSERTIVELY but never spike. The Listmonk sliding-window cap
+(`/usr/local/bin/pw-listmonk-rampcap`, daily cron 07:20 UTC, driven off the same
+`/etc/postfix/pw-warmup-start` stamp) enforces this automatically:
+
+| warmup day | hourly cap | ~daily total |
+|-----------:|-----------:|-------------:|
+| 0-1        | 50/h       | ~500         |
+| 2-3        | 150/h      | ~1,500       |
+| 4-6        | 250/h      | ~2,500       |
+| 7+         | 300/h      | ~3,000 (hard ceiling) |
+
+Hard rule from the data: **never exceed ~4k/day, never spike.**
+
+Other rules:
+1. **Best recipients first.** Gmail + Microsoft + clean ISPs only (Yahoo family
+   already excluded). Send small focused batches, e.g.
+   `build_trucking_campaigns --only-segment mcs150 --max-per-segment 100 --date <today> --send-hour <H>`.
+2. **Scrub hard bounces immediately.** `550 5.1.1`, full mailbox, "not our
+   customer" all hurt reputation signals.
+3. **Watch the signals daily** (see commands below). If Gmail `550-5.7.1` or
    Yahoo `421 TSS04` reappear, STOP and hold for several days.
-5. **Ramp Listmonk's sliding window in step with the IP warmup** (e.g. 50/h ->
-   150/h -> 300/h as days pass and signals stay clean). Restart the listmonk
-   container after changing `settings`.
 
 ## Monitoring commands