How often to send marketing email

How often you email people affects deliverability through their reactions. Every message someone didn't want is a chance for a spam report or an unsubscribe, and spam reports count against every later send from your domain. Choosing a frequency comes down to what your recipients expect from you.

There is no official number

Gmail, Yahoo and Microsoft don't say how many marketing emails per week is acceptable. What Gmail measures is the user-reported spam rate. Its email sender guidelines ask you to keep that rate below 0.1% in Postmaster Tools and never reach 0.3%, and its sender FAQ says bulk senders above 0.3% can't get delivery mitigation until the rate stays below it for 7 consecutive days. Yahoo's best practices use the same 0.3% line for bulk senders.

0.1% is one report per thousand messages. On a send to 2,000 Gmail recipients, three spam reports put you at 0.15%. A small list has very little room, and every extra send is another chance for a report.

Send what people signed up for

The safest cadence is the one you described at signup. "Monthly product updates" sets an expectation. A weekly promotion sent under that name breaks it, and people who feel they never agreed to the mail tend to press the spam button instead of looking for the unsubscribe link. Yahoo's guidance says the same thing directly: don't start sending daily email to people who subscribed to a weekly or monthly mailing.

If you want to send more often, ask. Offer the higher cadence as a separate list or topic and let people opt in. The people who opt in want the extra mail, and everyone else keeps the cadence they signed up for.

Keep the cadence steady

Gmail asks senders of large volumes to send at a consistent rate and avoid bursts. That applies to your calendar as well as to a single send. Three months of silence followed by three campaigns in one week is the sudden spike Gmail warns about, and recipients who have forgotten signing up are more likely to report it. Gmail also says you can increase volume faster when you send daily instead of weekly, so a regular schedule makes later growth easier.

If you've been quiet for months, restart the way you would warm up a new sending domain: engaged contacts first, growing over several days.

Don't mail the same people twice in one day

Most accidental over-sending comes from overlapping audiences. The common cases:

• Two campaigns on the same day go to segments that share most of their members, such as "all customers" and "customers in the US".
• Different people on your team schedule a newsletter and a product announcement without seeing each other's plans.
• A campaign with a mistake is re-sent in full when a short correction to the people who received it would do.
• Automated sequences such as onboarding or re-engagement run on top of the regular campaign calendar.

Before you schedule, check what else reaches the same people that week. Leave out recipients who just heard from you. Our guidance is to keep at least a full day between marketing emails to any one person, and preferably several days. If two announcements are ready on the same day, put them in one email.

Back-to-back sends also stack volume. On a young domain, two campaigns to a few hundred people sent close together can be enough for Gmail to defer messages with 421 4.7.28 and reject others with 550 5.7.1.

Count lifecycle mail too

Receipts and password resets are triggered by the recipient's own action, and they don't belong in the frequency count. Lifecycle mail does. Onboarding sequences and digests arrive on your schedule, and recipients judge them together with your campaigns. When you decide how often a person hears from you, count every message they didn't directly cause.

Let people choose less instead of leaving

Someone who decides your mail is too frequent usually does one of two things: unsubscribes, or reports it as spam. Make unsubscribing the easier of the two. Gmail requires one-click unsubscribe (RFC 8058) on marketing and subscribed messages from senders of more than 5,000 messages a day to Gmail accounts, and recommends honoring unsubscribe requests within 48 hours. Yahoo asks bulk senders to honor them within 2 days.

Better still, give people a way to get less mail without leaving entirely. Separate subscriptions let someone drop your offers and keep your newsletter, and a monthly digest gives weekly readers a lighter option.

Time zones and send time

No mailbox provider publishes a best hour to send. What matters is that mail arrives while people are awake and reading. A message that lands at 3:00 local time sits below everything that arrives before morning, and mail that gets skimmed past or deleted unread does nothing for you.

If your list spans several time zones, split it into segments by region and schedule each one for its own morning, or pick a time that falls in daytime for most of your recipients. When you schedule through an API, check the offset on the timestamp. A time ending in Z is UTC:

2026-11-03T09:00:00Z        09:00 UTC, which is 04:00 in New York that day
2026-11-03T09:00:00-05:00   09:00 in New York (EST)

An offset is fixed, so a recurring send scheduled with -05:00 shifts by an hour for New York readers when daylight saving time starts.

Signs your cadence is too high

• Unsubscribes per send rise when you add sends.
• The spam rate in Google Postmaster Tools climbs in weeks when you send more.
• Gmail starts deferring campaigns with 421 4.7.28 that used to go out cleanly. See email bounce codes explained.
• Clicks per send fall. Treat open rates with caution: some mail clients and security scanners load images automatically, and that counts as an open.

When you see these, reduce frequency for the least engaged part of your list first, and consider a re-engagement step for people who stopped clicking. Email list hygiene covers how to do that without mailing dead addresses for months.