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Re-warming and Seasonal Sending
Sender reputation is not permanent. Stop sending for a few weeks and inbox providers partially forget you. Spike volume far above your normal and they treat you like a stranger, or worse, a compromised account. This page covers coming back after a pause and planning seasonal peaks like Black Friday.
The rule for both situations is the same: change volume gradually, lead with your most engaged recipients, and let clean metrics earn the next step up. The Domain Warmup Guide is the original playbook. Re-warming is a shorter version of it.
Reputation Decays in Silence
Inbox providers score senders on recent behavior. Recent means weeks, not years. When you stop sending:
- Your engagement history goes stale and carries less weight.
- Providers lose their model of your normal volume.
- Your list decays underneath you. Addresses go dormant, get abandoned, or become spam traps.
A pause of a week or two usually costs you nothing. After 30 or more days idle, plan a deliberate re-warm instead of resuming at full volume. After several months, treat your domain as closer to new than established, and review your list with List Hygiene before sending anything.
Re-warming After a Pause
Re-warming follows the same shape as initial warmup, but smaller and faster. Your domain still has history, so you are reminding providers rather than introducing yourself.
- Clean the list first. Remove addresses that hard bounced before the pause and anyone whose consent has gone stale.
- Start with your most engaged segment: recent buyers, recent clickers, active users. For a 30 to 60 day pause, a first send of 10 to 20 percent of your normal volume is a reasonable opening.
- Double every few days while metrics stay clean. Watch bounces, complaints, and provider-specific engagement.
- Hold or step back if you see deferrals, spam placement, or an engagement drop at one provider. See the Bounce Guide for the signals.
- Resume normal volume once you reach it with clean metrics, then keep sending consistently so you do not repeat the cycle.
A 30 to 60 day pause typically takes 1 to 2 weeks to re-warm. Longer pauses take longer, and a pause of 6 months or more deserves the full warmup treatment.
Do not resume by blasting the full list with an apology or "we're back" campaign. The least engaged contacts are the most likely to complain or trap-hit, and a full-list send puts them all in the first batch.
Seasonal Senders
Black Friday, Cyber Monday, and holiday-only senders face a predictable problem: the days you most need the inbox are the days every other sender spikes too, and filters are at their most defensive.
Plan your ramp 4 to 6 weeks ahead of the peak:
- Never jump from 10k per day to 200k per day on the day. Providers read that as a compromised account and throttle or junk the surge.
- Pre-warm with value content to engaged segments. Gift guides, early access, previews, and useful content build volume history without burning your offer.
- Grow volume in steps each week so your peak-week volume is a step up from the prior week, not a cliff.
- Expect throttling if you spike anyway. Deferrals during peak season drain slowly because every sender is queued. See the Bounce Guide for deferral signals.
Your daily cap in Bento also grows with engagement, so a ramp serves both your provider reputation and your sending limits.
Sample 4-Week BFCM Ramp
Example for a sender whose normal volume is 10k per day targeting a 100k peak send. Scale the numbers to your own list.
| Week | Daily volume | Audience | Content |
|---|---|---|---|
| 4 weeks out | 10k to 15k | Engaged 90-day segment | Value content, gift guides |
| 3 weeks out | 20k to 30k | Engaged 180-day segment | Previews, early access signup |
| 2 weeks out | 40k to 50k | Engaged plus warm re-engagement | Teasers, waitlist, content |
| 1 week out | 60k to 80k | Full intended BFCM audience | Early access, first offers |
| BFCM week | 100k | Full audience, engaged first each day | Offers |
Within each big send, order recipients by engagement so the most active get it first. Their opens and clicks improve the reception of the rest of the batch. Throttle delivery over 8 to 12 hours rather than dumping the queue at once, using the batching approach from the warmup guide.
Volume Consistency
Receivers model your normal. Daily volume within a stable band looks like a healthy business. High variance, like silence punctuated by huge blasts, matches the pattern of a compromised account or a rented list, and filters respond accordingly.
Practical habits:
- Prefer steady cadence over occasional blasts. Four sends of 25k beat one send of 100k.
- If you only have content monthly, send monthly on a consistent schedule rather than at random.
- Spread large broadcasts over hours, not minutes.
- After any peak, step down gradually instead of dropping back to silence.
If You Spiked and Got Throttled
If you jumped volume anyway and providers pushed back:
- Slow down immediately. Cut sending speed and pause any queued broadcasts to the affected provider.
- Let deferrals drain. Deferred mail retries automatically. Piling more volume on top extends the backlog and deepens the penalty.
- Send to engaged-only segments while throttled. Recent clickers and buyers generate the positive signals that release the throttle.
- Do not retry the same broad campaign aggressively. Repeating the spike that caused the throttle reads as abuse.
- Check placement. If mail is landing in spam rather than just delivering slowly, follow Spam Folder Recovery.
Watch the recovery in the Deliverability Monitor and in Google Postmaster Tools. Most throttling clears within days once volume drops and engagement signals recover. Then ramp back up in steps, not in one jump.