# How to send more in Q4 without burning your list

Canonical: https://brew.new/blog/send-more-in-q4-without-burning-your-list
Author: Philip Sørensen
Published: 2026-10-03
Updated: 2026-10-03

A Q4 frequency plan decides how much more email you send between October and December, who gets the extra volume, and in what order. Send more, just not to the half of the list that has not clicked since spring.

A list fine with two emails a week in September can spike complaints in Black Friday week (November 27 this year). Our plan: tier by real engagement, add volume to the best tier first, widen to colder tiers in slices, cap frequency per person, and clean the list in October.

## Key takeaways

- Keep your Gmail spam rate under 0.1% daily. Above 0.3%, Google says you are ineligible for delivery mitigation until you stay under it for 7 consecutive days.
- Tier contacts by clicks, purchases and site activity in the last 30, 90 and 180 days, never by opens, which Apple Mail inflates.
- Add volume to the 30-day tier first, then the 91-180 day tier in quarter slices.
- Cap emails per person across campaigns and automations, say one a day in Black Friday week.
- Sunset in October: one re-permission email to contacts silent 180 days, then suppress non-responders.
- Gmail requires RFC 8058 one-click unsubscribe headers on marketing email, Yahoo strongly recommends them, and both expect unsubscribes honored within 2 days.

## Why the holiday peak is where reputations break

Google's [email sender guidelines](https://support.google.com/mail/answer/81126) tell bulk senders to "start with a low sending volume to engaged users, and slowly increase the volume over time," and warn that "immediately doubling previously sent volumes suddenly could result in rate limiting or reputation drops." Excess volume typically draws `4.7.28` errors. Google says pause at least 10 minutes, then resume on one connection.

Yahoo's [sender best practices](https://senders.yahooinc.com/best-practices/) agree: "Honor the frequency of the list's intent. Don't start sending daily emails to subscribers of your weekly or monthly mailing." The M3AAWG [Senders Best Common Practices](https://www.m3aawg.org/sites/default/files/legacy/document/M3AAWG_Senders_BCP_Ver3-2015-02.pdf) (February 2015, still widely quoted) notes that "unexpected increases in the frequency of messages often leads to increased abuse complaints."

Send a weekly subscriber eight emails in nine days and most ignore it. A few click "Report spam," and a few is enough.

## The thresholds you are actually managing

| Rule | Gmail | Yahoo | Outlook.com |
| --- | --- | --- | --- |
| Applies to | Over 5,000 messages a day to Gmail accounts | "Bulk" senders, no number published | Domains sending over 5,000 emails a day |
| Spam complaint rate | Below 0.1%, never reach 0.3% | Below 0.3% | No number published |
| One-click unsubscribe | Required for marketing mail, RFC 8058 headers | Required for marketing mail, RFC 8058 POST "highly recommended," `mailto:` accepted | "Functional unsubscribe links" recommended |
| Honor unsubscribes | Within 48 hours | Within 2 days | Not specified |
| Authentication | SPF, DKIM and DMARC (`p=none` minimum) | SPF, DKIM and DMARC | SPF, DKIM and DMARC, rejected with `550 5.7.515` if missing |

Sources: Google's [guidelines](https://support.google.com/mail/answer/81126) and [sender FAQ](https://support.google.com/mail/answer/14229414), Yahoo's [best practices](https://senders.yahooinc.com/best-practices/) and [FAQ](https://senders.yahooinc.com/faqs/), and Microsoft's [April 2025 announcement](https://techcommunity.microsoft.com/blog/microsoftdefenderforoffice365blog/strengthening-email-ecosystem-outlook%E2%80%99s-new-requirements-for-high%E2%80%90volume-senders/4399730).

Spam rate "is calculated daily," per Google's FAQ, so one bad send sinks the day. From November 2025, Gmail is "ramping up its enforcement on non-compliant traffic," including temporary and permanent rejections.

### What 0.1% means in real numbers

One complaint per 1,000 delivered. Land 200,000 Gmail inboxes on Black Friday and you can absorb about 200. At 600 you hit 0.3%.

Google's [Postmaster Tools documentation](https://support.google.com/mail/answer/14668346) counts messages "delivered to engaged recipient's Inbox and then marked as spam," and warns that if much of your mail already goes to spam, "the rate shown in the dashboard might seem low, because recipients get fewer of your messages in their Inbox." A low rate in a bad week can mean you are already in spam.

## Tier the list by engagement, using clicks rather than opens

Opens broke with iOS 15 in 2021: Apple's [Mail Privacy Protection page](https://www.apple.com/legal/privacy/data/en/mail-privacy-protection/) says "Protect Mail Activity downloads remote content in the background by default, regardless of whether you engage with the email," and its [iPhone guide](https://support.apple.com/guide/iphone/use-mail-privacy-protection-iphf084865c7/ios) says it "prevents senders from seeing if you've opened the email message they sent you." An open-based "engaged" segment fills with people who never read you. More in [why opens are a weak metric](/blog/email-metrics-that-matter).

Tier on the most recent signal a person had to produce:

- an email click, excluding security-scanner clicks
- a purchase, order or subscription event
- a login, app session or site visit tied to the contact
- the signup date, for new subscribers

| Tier | Definition | Q4 role |
| --- | --- | --- |
| New | Subscribed in the last 30 days | Welcome flow, then the Active cadence |
| Active | Clicked, bought or visited in the last 30 days | Most of the extra volume |
| Warm | Last activity 31 to 90 days ago | Moderate increase, the main growth tier |
| Lapsing | Last activity 91 to 180 days ago | Added in slices from early November |
| Dormant | No activity in 180 days, or never | Re-permission in October, then suppressed |

Infrequent senders need longer windows. Klaviyo's [engaged segment guide](https://help.klaviyo.com/hc/en-us/articles/115000200072) suggests "a long time period (e.g., 60 days rather than 30 days)" in that case. Match windows to your purchase cycle and hold them fixed all quarter ([segmentation guide](/blog/email-segmentation)).

## Ramp volume one tier at a time

Counts are marketing emails per person per week.

![Grid of emails per week by engagement tier from October to December, with Active peaking at one a day in Black Friday week, Lapsing added in 25% slices and Dormant suppressed after one re-permission email, plus four stop rules.](/images/blog/send-more-in-q4-without-burning-your-list-tier-ramp.png)

*A sample Q4 ramp. A tier gets more only after the one above holds for a week.*

The order matters more than the counts:

1. **October 5 to 18: clean and baseline.** Sunset, check authentication, record normal complaint, bounce and unsubscribe rates.
2. **October 19 to November 1: warm Active and Warm.** Active goes from two to three a week, Warm from one to two. Keep the send rate steady, not everything at 9am.
3. **November 2 to 15: Lapsing in slices.** Email about 25%, wait about 48 hours, repeat. Lapsing joins at one a week once all four slices come back clean.
4. **November 16 to December 1: the peak.** Thanksgiving November 26, Black Friday November 27, Cyber Monday November 30. Active gets three or four emails the week of November 16, then up to one a day from November 23 to December 1. Warm stays around three a week, Lapsing one or two. The Cyber Monday "last hours" email goes to Active and Warm only.
5. **December 2 to 20: shipping deadlines.** One or two emails per cutoff, not five.
6. **December 21 to 31: wind down.** Gift cards and post-holiday offers go to Active and Warm. Lapsing contacts who never clicked move to Dormant in January.

### Stop rules for every send

Decide now. Nobody decides well at 11pm on Black Friday.

| Signal | What to do |
| --- | --- |
| Gmail spam rate above 0.1% on any day | Freeze expansion. Next send goes to Active only. |
| Gmail spam rate at or above 0.3% | Stop Warm and Lapsing until the rate stays under 0.3% for 7 days. |
| A Lapsing slice hard-bounces above 2% | Stop the slice. Validate or drop those old addresses. |
| `4.7.28` deferrals from Gmail | Spread the send over more hours and cut volume until errors fall. |
| Unsubscribe rate doubles your baseline | Drop that tier by one email a week. |

The 2% bounce line is ours. Google and Yahoo do not publish one.

## Cap frequency per person, across everything you send

Cart, browse, back-in-stock, post-purchase and welcome automations can turn a sane calendar into nine emails a week. Cap the total per person:

- **Active.** One marketing email a day in peak week, four in a normal holiday week.
- **Warm.** Three a week.
- **Lapsing.** Two a week, after the slices clear.
- **Recent buyers.** Skip them in the next push for the same product. "Last chance, 30% off" right after a full-price receipt is a complaint waiting to happen.

At the cap, drop the promotion, keep the triggered email. Without a native cap, skip anyone who got a campaign in the last 24 hours.

## Suppress and sunset in October, not January

Year-round, suppress hard bounces, complainers, repeat soft bounces, and unsubscribes within the 48 hours Google recommends and the 2 days Yahoo requires. US law allows [10 business days](https://www.law.cornell.edu/uscode/text/15/7704), but the providers expect faster.

Dormant is where spam traps live. Spamhaus [describes "dead" address traps](https://www.spamhaus.org/resource-hub/deliverability/spamtraps-fix-the-problem-not-the-symptom/) as once-valid addresses that hard-bounced "for a period of time, often 12 months or more," before being revived as traps. M3AAWG's [spam trap guide](https://www.m3aawg.org/sites/default/files/doc_files/help_i_hit_a_spam_trap.pdf) calls them recycled traps and suggests operators wait 12 months or more before converting.

The sunset policy:

1. First week of October, list every contact with no click, purchase or site activity in 180 days.
2. Send one re-permission email: plain subject, one "stay subscribed" button, a clear note that you will stop otherwise.
3. Wait about 10 days. Clickers go back to Warm.
4. Suppress the rest, keeping records so nobody re-adds them.

Yahoo recommends "sending a reconfirmation email to inactive subscribers periodically." Our [win-back guide](/blog/win-back-emails) covers defining inactivity.

## Give people a way to get less email

Overloaded subscribers pick unsubscribe or report spam. A "fewer emails" option keeps some. The CAN-SPAM Act ([15 U.S.C. 7704](https://www.law.cornell.edu/uscode/text/15/7704)) allows "a list or menu from which the recipient may choose the specific types of commercial electronic mail messages the recipient wants to receive or does not want to receive," as long as it "includes an option under which the recipient may choose not to receive any commercial electronic mail messages from the sender." Try a 30-day pause, newsletter-only, or a weekly digest.

Opt-down never replaces the header. Google's FAQ says one-click removes the recipient "only from the mailing list associated with the message," and a body link may go to a preferences page, but that link "alone, without one-click unsubscribe email headers, doesn't meet the one-click unsubscribe requirement."

```http
List-Unsubscribe: <https://example.com/unsubscribe/opaque-token>
List-Unsubscribe-Post: List-Unsubscribe=One-Click
```

[RFC 8058](https://www.rfc-editor.org/rfc/rfc8058) requires an HTTPS URI in `List-Unsubscribe`, the exact value `List-Unsubscribe=One-Click` in `List-Unsubscribe-Post`, a DKIM signature covering both, and no HTTPS redirect. The POST carries no cookies or authorization, so the URL must identify the recipient and list.

## How to do this in Brew

**Tiers.** Saved audiences filter on contact properties, subscription status, and whether a contact ever opened, clicked or was sent an email. For 30 and 90 day tiers, build an event snapshot: ask Brew's agent in chat, or call `create_audience_from_events` over MCP or `POST /v1/audiences/from-events`. Snapshots exclude machine clicks by default and cover up to 90 days, so a 180-day tier takes two: build days 1 to 90 and 91 to 180, then one saved audience that ORs their filters (shown by `GET /v1/audiences/{id}`), so nobody gets the email twice. They freeze when built, so rebuild before big sends. The `exclude` option returns everyone in a base audience who did not match, so "no clicks in 90 days" is one call. See the [Create Audiences docs](https://docs.brew.new/audience/create-audiences).

**Purchases and site activity.** Sync them onto contacts as properties via an integration such as Shopify or Stripe, or the API, then filter dates with `before` and `after`.

**Slices and ramps.** [Gradual send](https://docs.brew.new/create-emails/send-options) splits one send into percentage batches, hourly or daily, each growing by your increment, up to 30 batches and 50,000 recipients. Pause between batches if a slice looks bad.

**Suppression.** Brew suppresses hard bounces and spam complaints immediately, and repeated soft bounces after a threshold. Imports, the API and MCP never re-subscribe anyone. Every marketing and automation send carries the RFC 8058 headers.

**Monitoring.** Brew Insights flags a campaign or automation step when its complaint rate is proven above 0.1%. The unsubscribe page's Activity tab shows the 30-day unsubscribe rate and reasons, including the default "Too many emails."

**Opt-down and caps.** Contacts are subscribed or unsubscribed, and caps and preference pages are yours to build. Host a form, write the choice to a custom field such as `email_frequency` or `paused_until` through the contacts API, and filter on it in each send's audience. For a cap, exclude anyone in an event snapshot of `sent` over the last day.

## Frequently asked questions

### How many emails should I send during Black Friday week?

Up to one a day to contacts who clicked or bought in the last 30 days, about three to those active in 90, one or two to anyone older. Your real limit is a daily Gmail spam rate under 0.1%.

### What spam complaint rate is too high for Gmail and Yahoo?

Google says stay below 0.1% and never reach 0.3%. Yahoo says below 0.3%. Above that, Google says you are ineligible for delivery mitigation until you stay under it for 7 consecutive days.

### Should I email inactive subscribers during the holidays?

Add contacts inactive for 91 to 180 days in slices from early November. Anyone inactive longer gets one re-permission email in October and is suppressed if they do not respond.

### Can I still use open rates to build engaged segments?

No. Apple Mail Privacy Protection downloads remote content, including tracking pixels, whether or not the person reads the email. Use bot-filtered clicks, purchases, logins and site visits instead.

### Is a preference center enough to meet the one-click unsubscribe requirement?

No. Gmail requires the RFC 8058 `List-Unsubscribe` and `List-Unsubscribe-Post` headers on marketing email, and Yahoo requires a working one-click `List-Unsubscribe` header and highly recommends RFC 8058. A preferences or opt-down link in the body only counts in addition to the headers.