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There is no single ideal number of promotional emails for every ecommerce store. Set a predictable baseline, explain it at signup, give subscribers a way to receive fewer messages, and adjust cadence by audience segment. Judge changes by clicks, conversions, unsubscribes and complaints—not opens alone.
Why email frequency has no universal answer
Email cadence means both how often messages go out and the sequence in which they arrive. The right pattern depends on your audience, products, subscriber engagement and season. A daily schedule that suits one group may overwhelm another, while an irregular stream can leave subscribers unsure what to expect.
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In a 2024 analysis of more than one million campaigns, MailerLite reported average click-through rates of 5.8% for twice-weekly campaigns, 5% for weekly campaigns, 4.6% for monthly campaigns and 5.3% for daily campaigns, as reported by Shopify in 2025. The analysis also reported open rates around 34% for monthly and twice-weekly campaigns and around 31% for daily campaigns. These are averages from that dataset, not forecasts or proof that changing frequency will produce the same result for your store. Shopify’s email frequency analysis
The same Shopify report says irregularly sent campaigns had a 0.9% unsubscribe rate, compared with about 0.4% for daily, weekly or twice-weekly campaigns. It compares those figures with a 0.19% ecommerce average attributed to Mailchimp, but the figures come from different datasets and should not be treated as directly comparable. The useful lesson is not to send daily; it is to avoid assuming that fewer, sporadic campaigns are automatically better.
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Set expectations and offer a way to opt down
Tell people at signup what kinds of email they are opting into and roughly how often they can expect to hear from you. Where your email system supports it, let subscribers choose a digest, a lower-frequency option or a temporary pause instead of making unsubscribe the only alternative.
That choice addresses a common source of friction. In a 2022 Baymard Institute benchmark, 80% of ecommerce sites did not let users adjust newsletter frequency. In a survey of 2,473 US adult internet shoppers, 59% said they unsubscribe or avoid signing up because they receive too many newsletter emails generally, and 51% cited emails arriving too often from a specific retailer. These results describe that benchmark and US survey, not every market or customer base. Baymard Institute’s newsletter frequency findings
Keep promotional campaigns separate from other email
Transactional messages
Order confirmations and shipping updates serve an immediate practical purpose. Shopify says to send these transactional messages immediately; they should not be managed as if they were ordinary promotional campaigns. Shopify’s email frequency guidance
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Welcome and behavior-triggered flows
Welcome messages and behavior-triggered sequences have their own timing and logic. Plan them separately from the regular campaign calendar so a subscriber does not accidentally receive a dense cluster of automated messages plus scheduled promotions.
Promotional campaigns
For newsletters and sales campaigns, choose a cadence you can sustain and communicate. Avoid abrupt, unexplained volume spikes. A predictable pattern gives you a clearer basis for interpreting engagement and for deciding whether a change helped.
Use segments before increasing overall volume
Do not raise frequency for the entire list just because some customers respond well to more email. Segment by engagement, customer status, stated preferences and purchase history, then tailor campaign frequency to those differences. Subscribers who actively click or have asked for updates may welcome more frequent messages; less-engaged subscribers may be better served by fewer, more relevant campaigns.
Compare cadence options within meaningful groups rather than treating the list as one audience. Keep the message type in view, too: a useful replenishment reminder and a broad promotional blast are not interchangeable simply because both arrive in an inbox.
Test cadence using signals beyond opens
- Choose a focused change. For example, compare weekly with twice-weekly promotional email for a defined segment, rather than changing cadence, content and targeting simultaneously.
- Use comparable groups or periods. Keep the audience and campaign purpose as similar as practical so the cadence is not confused with unrelated differences.
- Track clicks and conversions. Click-through indicates whether recipients acted on the message; conversions, where available, help connect email activity to business outcomes.
- Watch opt-outs and complaints. A rise in unsubscribes or complaints can signal that added volume is unwelcome, even if opens appear healthy.
- Interpret opens cautiously. Privacy features can inflate open rates, so do not use opens as the sole success measure.
Shopify recommends evaluating open, click-through and unsubscribe rates and describes testing cadence and send timing. Treat a test as evidence about the segment and conditions you measured, not as a universal rule for the whole store. Shopify’s testing and measurement guidance
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Make seasonal increases temporary and deliberate
Major shopping periods can support a short-term increase when subscribers expect timely offers and reminders. Shopify quotes Jacob Sappington, director of email strategy at Homestead Studio, recommending multiple messages on Black Friday and Cyber Monday while advising against routinely doubling up on messages to the same people during the rest of the year. Treat that as one strategist’s approach, not a universal required schedule. Shopify’s seasonal cadence discussion
Before a seasonal push, decide which segments should receive the additional campaigns, how long the increase will last and what signals would prompt you to scale back. A temporary event cadence should not silently become the year-round baseline.
Do not mistake sender rules for marketing advice
Google’s bulk-sender rules concern authentication, unwanted or unsolicited email and easy unsubscribing—not the ideal number of campaigns for an ecommerce brand. Google says senders delivering 5,000 or more messages a day to Gmail accounts must meet its bulk-sender requirements. For marketing and promotional messages, its guidance calls for List-Unsubscribe headers under RFC 8058. Check Google’s current requirements for implementation details; this threshold and guidance do not prescribe a campaign cadence. Google’s email sender guidelines
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- State the expected types and approximate frequency of promotional email at signup.
- Provide a workable lower-frequency, digest or pause option where possible.
- Keep transactional, welcome and behavior-triggered messages distinct from scheduled campaigns.
- Start with a consistent promotional pattern, then adapt it by segment rather than increasing volume for everyone.
- Test one meaningful cadence change and assess clicks, conversions, unsubscribes and complaints alongside open data.
- Use higher frequency for a defined seasonal window only when the audience and campaign justify it.
A 2025 Litmus summary of a Dynata survey of 1,000 US adults found that 32% preferred weekly emails and 20% preferred two to three emails per week. Those are general consumer preferences, not an ecommerce-specific prescription. Use them as context for why preferences vary, not as a target your store must meet. Litmus’s email frequency survey summary
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