How Many Emails Should You Send Per Month to Customers?

Send too many emails and people unsubscribe. Send too few and they forget you exist. Most businesses guess at the right number instead of actually working it out. This guide breaks down how to find the email frequency that fits your business, without relying on a random "rule" that worked for someone else's list.

There Is No Universal Right Number

You'll find articles claiming the perfect number is 2 emails a week, or 4 a month, or 1 a day. None of these numbers are wrong. They're just answers to a different question than the one you're asking. The right frequency depends on your industry, your audience, and what each email is actually for.

A daily deals retailer and a B2B software company should never send at the same frequency. Comparing the two is like comparing how often two different cars need fuel without asking how far each one drives.

What Actually Determines Your Ideal Frequency

1. Your Industry

E-commerce and retail brands can often send 4 to 8 emails a month without hurting engagement, especially around sales and new arrivals. B2B companies usually see better results with 2 to 4 emails a month, since the buying cycle is longer and inboxes are more work-focused. Media and content businesses can send daily or even more, because the content itself is the product.

2. What Stage the Subscriber Is In

A brand-new subscriber who just signed up is warmer and more likely to open emails than someone who joined your list a year ago and never bought anything. New subscribers can handle a short burst of emails in their first two weeks. Older, less active subscribers usually need fewer emails, not more.

3. The Type of Email

Not every email should be counted the same way. A single newsletter counts differently than a cart-abandonment email that only fires when someone leaves items behind. Automated, behavior-triggered emails don't count against your "monthly frequency" the way scheduled broadcast emails do, because the subscriber caused them by their own action.

4. Your List Size and Quality

A smaller, highly engaged list can often handle more frequent emails than a large list built from years of sign-up forms and old purchases. If your list is full of people who signed up once and never engaged, sending more emails will only speed up unsubscribes and spam complaints.

General Frequency Benchmarks by Business Type

These numbers are starting points, not fixed rules. Your own list's behavior should always override a benchmark from an article like this one.

Signs You're Sending Too Many Emails

• Unsubscribe rate climbs steadily over several campaigns in a row
• Open rates drop even though your subject lines haven't changed
• Spam complaint rate rises above 0.1%
• Customers mention feeling "spammed" in support tickets or replies

Signs You're Sending Too Few Emails

• Subscribers forget signing up and mark your email as spam out of confusion
• Click rates are decent but sales tied to email stay flat month over month
• Customers say they didn't know about a sale or launch until after it ended
• Your list slowly goes cold because there's no regular reason to open your emails

How to Find Your Own Number

Instead of picking a number and hoping, test your way there.

1. Split your list into two even groups.
2. Send one group your current frequency for 60 days.
3. Send the other group one additional email per month.
4. Compare open rate, click rate, unsubscribe rate, and revenue per email between the two groups.
5. Whichever group performs better on revenue per subscriber, not just opens, tells you which direction to move.

Run this test every few months, since audience tolerance for email frequency shifts over time, especially after major holidays or sales periods when inboxes get more crowded.

Segment Instead of Guessing One Number for Everyone

The better question isn't "how many emails should I send," but "how many emails should this specific group receive." Active buyers who open every email can usually handle more frequent contact. Subscribers who haven't opened anything in 90 days should be moved to a much lighter schedule, or into a separate re-engagement sequence, before you decide to remove them from your list entirely.

Segmenting by engagement level, rather than sending one blanket frequency to your entire list, is the single biggest lever for improving results without increasing complaints.

Final Thoughts

There's no magic number of emails that works for every business. The right frequency comes from your industry norms, your list's engagement level, and real testing on your own audience. Start with the benchmarks in this guide, watch your unsubscribe and open rates closely, and adjust in small steps rather than big jumps. Consistency and relevance will always matter more than hitting a specific number of sends each month.