The short version
- Two to four campaigns a week suits most 7 and 8 figure stores.
- Raise frequency and segmentation together. Raising frequency alone burns the list.
- Unsubscribe and spam complaint rates are your real ceiling, not a number of sends.
- Sending more mail overall while sending less mail per person is the goal.
How often should we send is the most common question we get on audit calls, and on its own it is the wrong question. The answer depends almost entirely on a second variable that nobody asks about.
For most 7 and 8 figure stores, two to four campaigns a week works. But four a week to a properly segmented list and four a week to your entire database are completely different actions with completely different outcomes.
Frequency and segmentation are one decision, not two.
What actually breaks when you send more
Nothing breaks because of a number. Things break because of relevance. If you double frequency and every extra send is relevant to the person receiving it, revenue rises and complaints do not move. If you double frequency by mailing everyone twice as often, you will see it in unsubscribes within two weeks and in deliverability within a month.
Mailbox providers do not count your sends. They watch how people respond to them. A brand sending five relevant emails a week to engaged customers will out place a brand sending one irrelevant email a week to a stale list, every time.
The relationship that matters
Think of it as a budget. Each subscriber has a tolerance for how much they will hear from you before they disengage, and relevance is what buys you more of it.
That means the path to more sends is not a bigger calendar, it is better targeting. Segment by engagement and interest, and suddenly you can run twice as many campaigns while any individual person receives roughly the same amount of mail they did before, just more of it worth opening.
On one account, adding a real campaign strategy where there had been none took campaign revenue up 889.9% and campaigns to 42.38% of attributed revenue in four months. The volume went up, but so did the number of distinct audiences being written for.
How to raise volume safely
Increase gradually rather than in one jump, and watch the response before the next step. Add one send a week, hold for two or three weeks, check unsubscribe rate, spam complaint rate and inbox placement, then decide.
Protect your least engaged tier while you do it. They are the group that will complain first, and they contribute the least revenue, so there is no reason to include them in the increase at all.
Keep at least some of the additional volume non promotional. A calendar that is nothing but discounts trains people to ignore you between discounts, and it erodes margin at the same time.
The signals that say you have gone too far
Spam complaint rate is the one to watch hardest. It is the fastest way to damage a sending reputation and the slowest to repair. Unsubscribe rate rising across several consecutive sends is the next signal, particularly if it rises in your engaged tier rather than your dormant one.
Revenue per recipient falling while total revenue holds flat is the subtle one. It means you are extracting the same money from more sends, which is the beginning of fatigue even though the topline looks fine.
Open rate is not a reliable signal here and has not been since Apple Mail Privacy Protection started inflating it. Use clicks and complaints.
A reasonable starting point
If you are currently sending once a week to everybody, do not jump to four. Split the list by engagement, keep your dormant group where it is, and add a second weekly send for your engaged tier only. Watch for three weeks.
Almost every store we audit is under sending to the people who want to hear from them and over sending to the people who do not. Fixing that ratio is usually worth more than any change to the total number.