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docs: ramp schedule + pw-listmonk-rampcap, fresh-IP day-0 send started

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justin 2026-06-02 12:32:42 -05:00
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docs/email-deliverability-runbook.md
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@ -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